hash: fix "-Wsign-compare" warnings

There are a couple of trivial "-Wsign-compare" warnings in "hash.c". Fix
them.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/hash.h b/hash.h
index 4367acfec5..55d67ed83f 100644
--- a/hash.h
+++ b/hash.h
@@ -325,7 +325,7 @@ int hash_algo_by_name(const char *name);
 /* Identical, except based on the format ID. */
 int hash_algo_by_id(uint32_t format_id);
 /* Identical, except based on the length. */
-int hash_algo_by_length(int len);
+int hash_algo_by_length(size_t len);
 /* Identical, except for a pointer to struct git_hash_algo. */
 static inline int hash_algo_by_ptr(const struct git_hash_algo *p)
 {