Constness tightening for move/link_temp_to_file()

Signed-off-by: Junio C Hamano <junkio@cox.net>

cache.h

@@ -257,7 +257,7 @@ extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned l
 extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
 			      size_t bufsize, size_t *bufposn);
 extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
-extern int move_temp_to_file(const char *tmpfile, char *filename);
+extern int move_temp_to_file(const char *tmpfile, const char *filename);
 
 extern int has_sha1_pack(const unsigned char *sha1);
 extern int has_sha1_file(const unsigned char *sha1);

sha1_file.c

@@ -1348,7 +1348,7 @@ char *write_sha1_file_prepare(void *buf,
  *
  * Returns the errno on failure, 0 on success.
  */
-static int link_temp_to_file(const char *tmpfile, char *filename)
+static int link_temp_to_file(const char *tmpfile, const char *filename)
 {
 	int ret;
 	char *dir;
@@ -1381,7 +1381,7 @@ static int link_temp_to_file(const char *tmpfile, char *filename)
 /*
  * Move the just written object into its final resting place
  */
-int move_temp_to_file(const char *tmpfile, char *filename)
+int move_temp_to_file(const char *tmpfile, const char *filename)
 {
 	int ret = link_temp_to_file(tmpfile, filename);