tdf#123481 jurt: Avoid thread deadlocking

Change-Id: I7b6454090aeb1046a814520166a5b8c39b716f6d
Reviewed-on: https://gerrit.libreoffice.org/67861
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

jurt/com/sun/star/lib/util/AsynchronousFinalizer.java

@@ -92,7 +92,9 @@ public final class AsynchronousFinalizer {
             done = true;
             queue.notify();
         }
-        thread.join();
+        // tdf#123481 Only join if we are not in our own thread, else we have a deadlock
+        if (Thread.currentThread() != thread)
+            thread.join();
     }
 
     /**