Modifying an exception to log warning to actual do

what the warning says it will do.


git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10827 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/core/com/jme3/input/InputManager.java

@@ -602,6 +602,7 @@ public class InputManager implements RawInputListener {
         if (mapping == null) {
             //throw new IllegalArgumentException("Cannot find mapping: " + mappingName);
             logger.log(Level.WARNING, "Cannot find mapping to be removed, skipping: {0}", mappingName);
+            return;
         }
 
         ArrayList<Integer> triggers = mapping.triggers;