for_each_recent_reflog_ent(): simplify opening of a reflog file

There is no reason to use a temporary variable logfile.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

refs.c

@@ -2320,13 +2320,11 @@ static int show_one_reflog_ent(struct strbuf *sb, each_reflog_ent_fn fn, void *c
 
 int for_each_recent_reflog_ent(const char *refname, each_reflog_ent_fn fn, long ofs, void *cb_data)
 {
-	const char *logfile;
 	FILE *logfp;
 	struct strbuf sb = STRBUF_INIT;
 	int ret = 0;
 
-	logfile = git_path("logs/%s", refname);
-	logfp = fopen(logfile, "r");
+	logfp = fopen(git_path("logs/%s", refname), "r");
 	if (!logfp)
 		return -1;