libgit2/libgit2 — pull request #1212 by arrbee (2013-01-09 01:15:04+00:00)
Title: Resolve crash with diff against empty file

It is not legal inside our `p_mmap` function to mmap a zero length file. This adds a test that exercises that case inside diff and fixes the code path where we would try to do that.

The fix turns out not to be a lot of code since our default file content is already initialized to `""` which works in this case.

Fixes #1210