More thread safety

EssentialsChat/src/com/earth2me/essentials/chat/EssentialsChatPlayer.java

@@ -44,6 +44,8 @@ public abstract class EssentialsChatPlayer implements Listener
 		{
 			return true;
 		}
+		synchronized (listeners)
+		{
 			for (IEssentialsChatListener listener : listeners.values())
 			{
 				if (listener.shouldHandleThisChat(event))
@@ -51,6 +53,7 @@ public abstract class EssentialsChatPlayer implements Listener
 					return true;
 				}
 			}
+		}
 		return false;
 	}
 
@@ -155,10 +158,13 @@ public abstract class EssentialsChatPlayer implements Listener
 			}
 
 			String message = String.format(event.getFormat(), type.concat(sender.getDisplayName()), event.getMessage());
+			synchronized (listeners)
+			{
 				for (IEssentialsChatListener listener : listeners.values())
 				{
 					message = listener.modifyMessage(event, onlinePlayer, message);
 				}
+			}
 			onlineUser.sendMessage(message);
 		}
 	}