fixed RPC call for api that was missing request id

rhodecode/controllers/api/__init__.py

@@ -233,8 +233,13 class JSONRPCController(WSGIController):
             return json.dumps(response)
         except TypeError, e:
             log.debug('Error encoding response: %s', e)
-            return json.dumps(dict(result=None,
-                                   error="Error encoding response"))
+            return json.dumps(
+                dict(
+                    self._req_id,
+                    result=None,
+                    error="Error encoding response"
+                )
+            )
 
     def _find_method(self):
         """