format-patch: improve head calculation for cover-letter

diff --git a/git-compat-util.h b/git-compat-util.h
index 90e037203879f6ba91403ae5371f18910206b580..cde442fb5f47cd13757e09ae435963bc061db083 100644 (file)
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -163,6 +163,7 @@
 typedef long intptr_t;
 typedef unsigned long uintptr_t;
 #endif
+int get_st_mode_bits(const char *path, int *mode);
 #if defined(__CYGWIN__)
 #undef _XOPEN_SOURCE
 #include <grp.h>