Merge pull request kaimallea#28 from Dcard-Fork/master

fix error cause by sometimes body return without data attributes

lib/imgur.js

@@ -96,7 +96,7 @@ imgur._imgurRequest = function (operation, payload, extraFormParams) {
                 if (err) {
                     deferred.reject(err);
                 } else if (!body.success) {
-                    deferred.reject({status: body.status, message: body.data.error});
+                    deferred.reject({status: body.status, message: body.data ? body.data.error : 'No body data response'});
                 } else {
                     deferred.resolve(body);
                 }