Rethrow uncaught exception.

jme3-core/src/main/java/com/jme3/app/SimpleApplication.java

@@ -267,6 +267,7 @@ public abstract class SimpleApplication extends LegacyApplication {
             simpleUpdate(tpf);
         }catch(Exception e){
             logger.log(Level.WARNING, "Uncaught exception in simpleUpdate():", e);
+            throw e;
         }
 
         if (prof != null)