patch parsing: ensure empty patches are illegal
patch parsing: ensure empty patches are illegal

Corillian/libgit2,Corillian/libgit2,Corillian/libgit2,Corillian/libgit2,stewid/libgit2,Corillian/libgit2,stewid/libgit2,stewid/libgit2,stewid/libgit2,Corillian/libgit2,stewid/libgit2,stewid/libgit2