Sometimes category values where being returned as string's rather than nodeRefs

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@7006 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/node/NodeRefPropertyMethodInterceptor.java

@@ -345,11 +345,11 @@ public class NodeRefPropertyMethodInterceptor implements MethodInterceptor
                                     QName type = nodeService.getType(test);
                                     if (dictionaryService.isSubClass(type, ContentModel.TYPE_CATEGORY))
                                     {
-                                        return inboundValue;
+                                        return test;
                                     }
                                     else
                                     {
-                                        return null;
+                                        return test;
                                     }
                                 }
                                 else