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
--- a/mercurial/cext/revlog.c Mon Mar 14 14:10:41 2022 +0000
+++ b/mercurial/cext/revlog.c Mon Mar 14 17:57:03 2022 +0100
@@ -179,7 +179,7 @@
/* next free offset: 73 */
static const char comp_mode_inline = 2;
-static const char rank_unknown = -1;
+static const int rank_unknown = -1;
static void raise_revlog_error(void)
{