twolfson/grunt-retro — pull request #2 by jmblog (2013-05-24 06:12:36+00:00)
Title: Fixed issue with missing this.files

When using a grunt plugin which is no src/dest or files were specified, the following warning occurs.

`Warning: Cannot read property 'orig' of undefined Use --force to continue.`

I met with it when I use `grunt-zip` (including `grunt-retro`) and `grunt-hogan`.