This patch is not yet upstream; there are missing braces under
the if (!no_modify && !zap_log) case so that a repair which fails
xlog_find_tail() will not be repairable, because -L will not be
able to zero out the log.

Reported-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>

Index: xfsprogs-4.5.0/repair/phase2.c
===================================================================
--- xfsprogs-4.5.0.orig/repair/phase2.c
+++ xfsprogs-4.5.0/repair/phase2.c
@@ -78,12 +78,13 @@ zero_log(
 		do_warn(
 		_("zero_log: cannot find log head/tail (xlog_find_tail=%d)\n"),
 			error);
-		if (!no_modify && !zap_log)
+		if (!no_modify && !zap_log) {
 			do_warn(_(
 "ERROR: The log head and/or tail cannot be discovered. Attempt to mount the\n"
 "filesystem to replay the log or use the -L option to destroy the log and\n"
 "attempt a repair.\n"));
 			exit(2);
+		}
 	} else {
 		if (verbose) {
 			do_log(