test_msg(): avoid recursion

In (highly unlikely) case localtime() failed, test_msg() calls
pr_perror() which is a wrapper around test_msg() so we're
calling ourselves, which can lead to infinite recursion if
localtime() keeps failing. Use fprintf() here to avoid this.
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Acked-by: Andrew Vagin <avagin@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm/lib/msg.c

@@ -50,7 +50,8 @@ void test_msg(const char *format, ...)
 	gettimeofday(&tv, NULL);
 	tm = localtime(&tv.tv_sec);
 	if (tm == NULL) {
-		pr_perror("localtime() failed");
+		fprintf(stderr, "ERROR in %s: localtime() failed: %m\n",
+				__func__);
 	} else {
 		off += strftime(buf, sizeof(buf), "%H:%M:%S", tm);
 	}