Fix a bunch of warnings

This change fixes a bunch of warnings that were discovered by compiling
with `clang -target=i386-pc-linux-gnu`. It turned out that the
intrinsics were not necessarily being used in all platforms! Especially
in GCC, since it does not support __has_builtin.

Some more warnings were gleaned from the Windows build, but I stopped
when I saw that some third-party dependencies (e.g. zlib) have warnings
of their own, so we might never be able to enable -Werror there.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/odb.c b/src/odb.c
index 3aedd80a6..9bd5d2416 100644
--- a/src/odb.c
+++ b/src/odb.c
@@ -95,7 +95,7 @@ int git_odb__format_object_header(
 	int hdr_max = (hdr_size > INT_MAX-2) ? (INT_MAX-2) : (int)hdr_size;
 	int len;
 
-	len = p_snprintf(hdr, hdr_max, "%s %lld", type_str, (long long)obj_len);
+	len = p_snprintf(hdr, hdr_max, "%s %"PRId64, type_str, (int64_t)obj_len);
 
 	if (len < 0 || len >= hdr_max) {
 		giterr_set(GITERR_OS, "object header creation failed");