[PATCH] Change handrolled strftime to strftime in zftp.c

[Wesley Schwengle <wesleyschwengle@gmail.com>]

From: Wesley Schwengle <wesley@schwengle.net>

Compiling zsh on Debian testing/unstable with cc (Debian 8.3.0-2) 8.3.0
emits a -Wformat-overflow= warning on line 1265 in zftp.c. Replace the
code with strftime() resolves it.

Signed-off-by: Wesley Schwengle <wesley@schwengle.net>
---
 Src/Modules/zftp.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/Src/Modules/zftp.c b/Src/Modules/zftp.c
index 4aaa1f072..e0789216a 100644
--- a/Src/Modules/zftp.c
+++ b/Src/Modules/zftp.c
@@ -1257,14 +1257,7 @@ zfstats(char *fnam, int remote, off_t *retsize, char **retmdtm, int fd)
 	if (retmdtm) {
 	    /* use gmtime() rather than localtime() for consistency */
 	    tm = gmtime(&statbuf.st_mtime);
-	    /*
-	     * FTP format for data is YYYYMMDDHHMMSS
-	     * Using tm directly is easier than worrying about
-	     * incompatible strftime()'s.
-	     */
-	    sprintf(tmbuf, "%04d%02d%02d%02d%02d%02d",
-		    tm->tm_year + 1900, tm->tm_mon+1, tm->tm_mday,
-		    tm->tm_hour, tm->tm_min, tm->tm_sec);
+	    strftime(tmbuf, 15, "%Y%m%d%H%M%S", tm);
 	    mt = ztrdup(tmbuf);
 	}
     }
-- 
2.21.0.196.g041f5ea1cf