Fixed class change NPE.

L2J_Mobius_1.0_Ertheia/java/com/l2jmobius/gameserver/model/actor/instance/L2PcInstance.java

@@ -9627,6 +9627,13 @@ public final class L2PcInstance extends L2Playable
 		
 		try
 		{
+			// Notify to scripts before class is removed.
+			if (!getSubClasses().isEmpty()) // also null check
+			{
+				final int classId = getSubClasses().get(classIndex).getClassId();
+				EventDispatcher.getInstance().notifyEventAsync(new OnPlayerProfessionCancel(this, classId), this);
+			}
+			
 			final SubClass subClass = getSubClasses().remove(classIndex);
 			if (subClass == null)
 			{
@@ -9686,10 +9693,6 @@ public final class L2PcInstance extends L2Playable
 				_log.log(Level.WARNING, "Could not modify sub class for " + getName() + " to class index " + classIndex + ": " + e.getMessage(), e);
 				return false;
 			}
-			
-			// Notify to scripts
-			int classId = getSubClasses().get(classIndex).getClassId();
-			EventDispatcher.getInstance().notifyEventAsync(new OnPlayerProfessionCancel(this, classId), this);
 		}
 		finally
 		{

L2J_Mobius_2.5_Underground/java/com/l2jmobius/gameserver/model/actor/instance/L2PcInstance.java

@@ -9634,6 +9634,13 @@ public final class L2PcInstance extends L2Playable
 		
 		try
 		{
+			// Notify to scripts before class is removed.
+			if (!getSubClasses().isEmpty()) // also null check
+			{
+				final int classId = getSubClasses().get(classIndex).getClassId();
+				EventDispatcher.getInstance().notifyEventAsync(new OnPlayerProfessionCancel(this, classId), this);
+			}
+			
 			final SubClass subClass = getSubClasses().remove(classIndex);
 			if (subClass == null)
 			{
@@ -9693,10 +9700,6 @@ public final class L2PcInstance extends L2Playable
 				_log.log(Level.WARNING, "Could not modify sub class for " + getName() + " to class index " + classIndex + ": " + e.getMessage(), e);
 				return false;
 			}
-			
-			// Notify to scripts
-			int classId = getSubClasses().get(classIndex).getClassId();
-			EventDispatcher.getInstance().notifyEventAsync(new OnPlayerProfessionCancel(this, classId), this);
 		}
 		finally
 		{

L2J_Mobius_3.0_Helios/java/com/l2jmobius/gameserver/model/actor/instance/L2PcInstance.java

@@ -9644,6 +9644,13 @@ public final class L2PcInstance extends L2Playable
 		
 		try
 		{
+			// Notify to scripts before class is removed.
+			if (!getSubClasses().isEmpty()) // also null check
+			{
+				final int classId = getSubClasses().get(classIndex).getClassId();
+				EventDispatcher.getInstance().notifyEventAsync(new OnPlayerProfessionCancel(this, classId), this);
+			}
+			
 			final SubClass subClass = getSubClasses().remove(classIndex);
 			if (subClass == null)
 			{
@@ -9703,10 +9710,6 @@ public final class L2PcInstance extends L2Playable
 				_log.log(Level.WARNING, "Could not modify sub class for " + getName() + " to class index " + classIndex + ": " + e.getMessage(), e);
 				return false;
 			}
-			
-			// Notify to scripts
-			int classId = getSubClasses().get(classIndex).getClassId();
-			EventDispatcher.getInstance().notifyEventAsync(new OnPlayerProfessionCancel(this, classId), this);
 		}
 		finally
 		{

L2J_Mobius_4.0_GrandCrusade/java/com/l2jmobius/gameserver/model/actor/instance/L2PcInstance.java

@@ -9637,6 +9637,13 @@ public final class L2PcInstance extends L2Playable
 		
 		try
 		{
+			// Notify to scripts before class is removed.
+			if (!getSubClasses().isEmpty()) // also null check
+			{
+				final int classId = getSubClasses().get(classIndex).getClassId();
+				EventDispatcher.getInstance().notifyEventAsync(new OnPlayerProfessionCancel(this, classId), this);
+			}
+			
 			final SubClass subClass = getSubClasses().remove(classIndex);
 			if (subClass == null)
 			{
@@ -9696,10 +9703,6 @@ public final class L2PcInstance extends L2Playable
 				_log.log(Level.WARNING, "Could not modify sub class for " + getName() + " to class index " + classIndex + ": " + e.getMessage(), e);
 				return false;
 			}
-			
-			// Notify to scripts
-			int classId = getSubClasses().get(classIndex).getClassId();
-			EventDispatcher.getInstance().notifyEventAsync(new OnPlayerProfessionCancel(this, classId), this);
 		}
 		finally
 		{

L2J_Mobius_CT_2.6_HighFive/java/com/l2jmobius/gameserver/model/actor/instance/L2PcInstance.java

@@ -10092,9 +10092,12 @@ public final class L2PcInstance extends L2Playable
 				return false;
 			}
 			
-			// Notify to scripts
+			// Notify to scripts before class is removed.
-			int classId = getSubClasses().get(classIndex).getClassId();
+			if (!getSubClasses().isEmpty()) // also null check
+			{
+				final int classId = getSubClasses().get(classIndex).getClassId();
 				EventDispatcher.getInstance().notifyEventAsync(new OnPlayerProfessionCancel(this, classId), this);
+			}
 			
 			getSubClasses().remove(classIndex);
 		}

L2J_Mobius_Classic_2.0_Saviors/java/com/l2jmobius/gameserver/model/actor/instance/L2PcInstance.java

@@ -9569,6 +9569,13 @@ public final class L2PcInstance extends L2Playable
 		
 		try
 		{
+			// Notify to scripts before class is removed.
+			if (!getSubClasses().isEmpty()) // also null check
+			{
+				final int classId = getSubClasses().get(classIndex).getClassId();
+				EventDispatcher.getInstance().notifyEventAsync(new OnPlayerProfessionCancel(this, classId), this);
+			}
+			
 			final SubClass subClass = getSubClasses().remove(classIndex);
 			if (subClass == null)
 			{
@@ -9628,10 +9635,6 @@ public final class L2PcInstance extends L2Playable
 				_log.log(Level.WARNING, "Could not modify sub class for " + getName() + " to class index " + classIndex + ": " + e.getMessage(), e);
 				return false;
 			}
-			
-			// Notify to scripts
-			int classId = getSubClasses().get(classIndex).getClassId();
-			EventDispatcher.getInstance().notifyEventAsync(new OnPlayerProfessionCancel(this, classId), this);
 		}
 		finally
 		{

L2J_Mobius_Classic_2.0_Zaken/java/com/l2jmobius/gameserver/model/actor/instance/L2PcInstance.java

@@ -9569,6 +9569,13 @@ public final class L2PcInstance extends L2Playable
 		
 		try
 		{
+			// Notify to scripts before class is removed.
+			if (!getSubClasses().isEmpty()) // also null check
+			{
+				final int classId = getSubClasses().get(classIndex).getClassId();
+				EventDispatcher.getInstance().notifyEventAsync(new OnPlayerProfessionCancel(this, classId), this);
+			}
+			
 			final SubClass subClass = getSubClasses().remove(classIndex);
 			if (subClass == null)
 			{
@@ -9628,10 +9635,6 @@ public final class L2PcInstance extends L2Playable
 				_log.log(Level.WARNING, "Could not modify sub class for " + getName() + " to class index " + classIndex + ": " + e.getMessage(), e);
 				return false;
 			}
-			
-			// Notify to scripts
-			int classId = getSubClasses().get(classIndex).getClassId();
-			EventDispatcher.getInstance().notifyEventAsync(new OnPlayerProfessionCancel(this, classId), this);
 		}
 		finally
 		{