fix synchronization of JobQueue

Change-Id: I51d58896065a06564d7963aab1145ba9083fdefc

jurt/com/sun/star/lib/uno/environments/remote/JobQueue.java

@@ -89,7 +89,7 @@ public class JobQueue {
             try {
                   enter(2000, _disposeId);
             } catch(Throwable throwable) {
-                synchronized (this) {
+                synchronized (JobQueue.this) {
                     if(!jobList.isEmpty() || _active) { // there was a job in progress, so give a stack
                         System.err.println(getClass().getName() + " - exception occurred:" + throwable);
                         throwable.printStackTrace(System.err);