namedirectory: don't parse request in case of failure

Change-Id: I6f210246551b13aad13fc4c543a733a7ab5d2abd

src/jamidht/namedirectory.cpp

@@ -165,7 +165,7 @@ NameDirectory::lookupAddress(const std::string& addr, LookupCallback cb)
                              addr.c_str(),
                              response.status_code);
                     cb("", Response::error);
-                }
+                } else {
                     try {
                         Json::Value json;
                         std::string err;
@@ -198,6 +198,7 @@ NameDirectory::lookupAddress(const std::string& addr, LookupCallback cb)
                         JAMI_ERR("Error when performing address lookup: %s", e.what());
                         cb("", Response::error);
                     }
+                }
                 requests_.erase(reqid);
             });
         request->send();