fixed array access exception with specification

org.fortiss.tooling.kernel.ui/trunk/src/org/fortiss/tooling/kernel/ui/internal/views/NavigatorTreeContentProvider.java

@@ -17,6 +17,7 @@ $Id$
 +--------------------------------------------------------------------------*/
 package org.fortiss.tooling.kernel.ui.internal.views;
 
+import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.List;
 
@@ -59,8 +60,8 @@ public class NavigatorTreeContentProvider implements ITreeContentProvider {
 			IModelElementHandler<EObject> handler = IModelElementHandlerService.INSTANCE
 					.getModelElementHandler((EObject) parentElement);
 			if (handler != null) {
-				List<EObject> children = handler
-						.getSubnodes((EObject) parentElement);
+				List<EObject> children = new ArrayList<EObject>();
+				children.addAll(handler.getSubnodes((EObject) parentElement));
 				children.addAll(handler
 						.getSpecifications((EObject) parentElement));
 				return children.toArray();