improve debugging

python/src/deltachat/events.py

@@ -151,12 +151,12 @@ class EventThread(threading.Thread):
     def mark_shutdown(self):
         self._marked_for_shutdown = True
 
-    def wait(self):
+    def wait(self, timeout=None):
         if self == threading.current_thread():
             # we are in the callback thread and thus cannot
             # wait for the thread-loop to finish.
             return
-        self.join()
+        self.join(timeout=timeout)
 
     def run(self):
         """ get and run events until shutdown. """