fsck.f2fs: don't ask anything on dry-run

It doesn't need to ask recovering corruption on dry-run mode.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fsck/main.c b/fsck/main.c
index 65bdb5d..d3f0c0d 100644
--- a/fsck/main.c
+++ b/fsck/main.c
@@ -822,7 +822,7 @@
 	f2fs_do_umount(sbi);
 
 	if (c.func == FSCK && c.bug_on) {
-		if (!c.ro && c.fix_on == 0 && c.auto_fix == 0) {
+		if (!c.ro && c.fix_on == 0 && c.auto_fix == 0 && !c.dry_run) {
 			char ans[255] = {0};
 retry:
 			printf("Do you want to fix this partition? [Y/N] ");