libgit2/libgit2 — pull request #585 by schu (2012-03-04 18:33:48+00:00)
Title: diff_output: fix -Wstrict-aliasing warning

Add an union mmfile_u to allow to use a git_map as mmfile_t required by
xdiff.

@nulltoken: Could you check if MSVC is happy with it? Thanks.