Fix: not trying to read res.text if err is true

Author: saraf

lib/webapp.js

@@ -48,7 +48,12 @@ module.exports = {
     var uri = util.format('projects/%d/repository/blobs/%s?filepath=%s', repo_id, branch, filename);
 
     api.get(account.config, uri, function (err, data, res) {
-      done(err, res.text);
+      if(err) {
+        return done(err, null);
+      }
+      else {
+        done(err, res.text);
+      }
     });
   },