Fix bug where Github url missing for 0-stars repo
Fix bug where Github url missing for 0-stars repo

Test Plan:
Tested on https://github.com/vbundles/ctrlp (before fix, github url
was null, afer fix, was there.)

Reviewers: spicyj, xymostech

Reviewed By: spicyj

Differential Revision: http://phabricator.benalpert.com/D141

shaialon/vim-awesome,divad12/vim-awesome,starcraftman/vim-awesome,vim-awesome/vim-awesome,shaialon/vim-awesome,starcraftman/vim-awesome,starcraftman/vim-awesome,jonafato/vim-awesome,jonafato/vim-awesome,vim-awesome/vim-awesome,vim-awesome/vim-awesome,divad12/vim-awesome,divad12/vim-awesome,vim-awesome/vim-awesome,vim-awesome/vim-awesome,starcraftman/vim-awesome,divad12/vim-awesome,shaialon/vim-awesome,shaialon/vim-awesome,jonafato/vim-awesome,jonafato/vim-awesome