Fix error logging

Signed-off-by: Lixfel <agga-games@gmx.de>

src/de/steamwar/bungeecore/ErrorLogger.java

@@ -47,7 +47,7 @@ public class ErrorLogger extends Handler {
         if(logRecord.getLevel().intValue() < Level.WARNING.intValue())
             return;
 
-        String message = MessageFormat.format(logRecord.getMessage(), logRecord.getParameters());
+        String message = logRecord.getParameters() != null ? MessageFormat.format(logRecord.getMessage(), logRecord.getParameters()) : logRecord.getMessage();
         for(String reason : ignoreContains)
             if(message.contains(reason))
                 return;