coverity#1326333 Unguarded write

Change-Id: I94026a7b66a0cac01a1e42d8eee0ec7b4d5fc513

bean/com/sun/star/comp/beans/LocalOfficeWindow.java

@@ -81,7 +81,7 @@ public class LocalOfficeWindow
      *
      * @param source The event object.
      */
-    public void disposing(EventObject source)
+    public synchronized void disposing(EventObject source)
     {
         // the window will be disposed by the framework
         mWindow = null;