builtin/blame.c: add translation to warning about failed revision walk

Signed-off-by: Stefan Beller <stefanbeller@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: stefanbeller

builtin/blame.c

@@ -2438,7 +2438,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 	 * uninteresting.
 	 */
 	if (prepare_revision_walk(&revs))
-		die("revision walk setup failed");
+		die(_("revision walk setup failed"));
 
 	if (is_null_sha1(sb.final->object.sha1)) {
 		char *buf;