repo::iterator: don't go out of bounds
repo::iterator: don't go out of bounds

Corillian/libgit2,leoyanggit/libgit2,Corillian/libgit2,joshtriplett/libgit2,leoyanggit/libgit2,stewid/libgit2,stewid/libgit2,leoyanggit/libgit2,leoyanggit/libgit2,joshtriplett/libgit2,Corillian/libgit2,leoyanggit/libgit2,Corillian/libgit2,stewid/libgit2,joshtriplett/libgit2,leoyanggit/libgit2,Corillian/libgit2,stewid/libgit2,stewid/libgit2,joshtriplett/libgit2,joshtriplett/libgit2,stewid/libgit2,joshtriplett/libgit2,Corillian/libgit2