Ensighten/grunt-spritesmith — pull request #12 by emlynmu (2013-03-08 13:34:13+00:00)
Title: Stop subsequent tasks from failing if a glob expands to no files to process.

The task was failing and causing all subsequent grunt tasks to fail if a blob was expanding to no files to process. This is useful for setting up grunt-spritesmith for new projects without any images to process yet. It also matches the behavior of other grunt tasks like concat.