Made the app-states taking constructor more defensive

so that it can be called with null in various ways
without throwing NPEs.


git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9167 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/core/com/jme3/app/SimpleApplication.java

@@ -102,10 +102,15 @@ public abstract class SimpleApplication extends Application {
 
     public SimpleApplication( AppState... initialStates ) {
         super();
+        
+        if (initialStates != null) {
             for (AppState a : initialStates) {
+                if (a != null) {
                     stateManager.attach(a);
                 }
             }
+        }
+    }
 
     @Override
     public void start() {