Merge branch 'gl/cleanup'

* gl/cleanup:
  Convert memset(hash,0,20) to hashclr(hash).
  Convert memcpy(a,b,20) to hashcpy(a,b).

cache.h

@@ -218,6 +218,14 @@ static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 {
 	return memcmp(sha1, sha2, 20);
 }
+static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
+{
+	memcpy(sha_dst, sha_src, 20);
+}
+static inline void hashclr(unsigned char *hash)
+{
+	memset(hash, 0, 20);
+}
 
 int git_mkstemp(char *path, size_t n, const char *template);