revlog: fix wrong type of rank_unknown variable...
revlog: fix wrong type of rank_unknown variable
We treat "rank" as an int everywhere, but declare rank_unknown as a
char. On architectures where char is signed, that works out ok, but
when char is unsigned, rank_unknown is 255 instead of -1.
Differential Revision:
https://phab.mercurial-scm.org/D12374