Qt: don't spam the log with too many debug messages...

This doesn't solve the fact that ItemChanged_Type is called WAY too often... Fenrir, ILEoo, ideas?

modules/gui/qt4/input_manager.cpp

@@ -150,7 +150,8 @@ void InputManager::customEvent( QEvent *event )
 
 #ifndef NDEBUG
     if( i_type != PositionUpdate_Type &&
-        i_type != StatisticsUpdate_Type )
+        i_type != StatisticsUpdate_Type &&
+        i_type != ItemChanged_Type )
         msg_Dbg( p_intf, "New Event: type %i", i_type );
 #endif