Fixed obsolete except syntax (thx krkos@cesnet.cz)

warden3/warden_server/warden_server.py

@@ -1105,7 +1105,7 @@ class WardenHandler(ObjectBase):
             # If client was already here, fetch server notion of his last id
             try:
                 id = self.db.getLastReceivedId(self.req.client)
-            except Exception, e:
+            except Exception as e:
                 self.log.info("cannot getLastReceivedId - " + type(e).__name__ + ": " + str(e))
                 
         if id is None: