ocfs2: Fix 2 warning during ocfs2 make.

fs/ocfs2/dir.c: In function ‘ocfs2_extend_dir’:
fs/ocfs2/dir.c:2700: warning: ‘ret’ may be used uninitialized in this function

fs/ocfs2/suballoc.c: In function ‘ocfs2_get_suballoc_slot_bit’:
fs/ocfs2/suballoc.c:2216: warning: comparison is always true due to limited range of data type

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 07d8920..c575230 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -2697,7 +2697,7 @@
 				    u32 *num_dx_entries,
 				    struct buffer_head *dirent_bh)
 {
-	int ret, namelen, i;
+	int ret = 0, namelen, i;
 	char *de_buf, *limit;
 	struct ocfs2_dir_entry *de;
 	struct buffer_head *dx_leaf_bh;