f2fs: change 0 to false for bool type

in the f2fs_fill_super function, variable "retry" is bool type
i think that it should be set as false.

Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 45aa843..160b883 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1230,7 +1230,7 @@
 
 	/* give only one another chance */
 	if (retry) {
-		retry = 0;
+		retry = false;
 		shrink_dcache_sb(sb);
 		goto try_onemore;
 	}