don't store avatar to local storage if it is 'img/genericPerson.png', #339

js/twister_io.js

@@ -389,6 +389,7 @@ function getAvatar(username, img) {
                 function(req, imagedata) {
                     if (imagedata && imagedata.length) {
                         _avatarMap[req.username] = imagedata;
+                        if (imagedata !== 'img/genericPerson.png')
                             _putResourceIntoStorage('avatar:' + username, imagedata);
                         req.img.attr('src', imagedata);
                     }