Use of isEmpty method when possible.
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		@@ -562,7 +562,7 @@ public abstract class FlagWar extends ClanHallSiegeEngine
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	@Override
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	public void onSiegeEnds()
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	{
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		if (_data.size() > 0)
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		if (!_data.isEmpty())
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		{
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			for (int clanId : _data.keySet())
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			{
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