fix SyntaxWarning: name 'CELERY_ON' is used prior to global declaration

rhodecode/lib/celerylib/__init__.py

@@ -59,6 +59,7 b' class ResultWrapper(object):'
 
 
 def run_task(task, *args, **kwargs):
+    global CELERY_ON
     if CELERY_ON:
         try:
             t = task.apply_async(args=args, kwargs=kwargs)
@@ -68,7 +69,6 b' def run_task(task, *args, **kwargs):'
         except socket.error, e:
             if isinstance(e, IOError) and e.errno == 111:
                 log.debug('Unable to connect to celeryd. Sync execution')
-                global CELERY_ON
                 CELERY_ON = False
             else:
                 log.error(traceback.format_exc())