Port patch for NativeObjectManager in Trunk r10889 to the 3.0 Final branch. https://code.google.com/p/jmonkeyengine/source/detail?r=10889

git-svn-id: https://jmonkeyengine.googlecode.com/svn/branches/3.0final@10909 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/core/com/jme3/util/NativeObjectManager.java

@@ -237,6 +237,7 @@ public class NativeObjectManager {
             }
         }
         refMap.clear();
+        refQueue = new ReferenceQueue<Object>();
     }
 
 //    public void printObjects(){