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: NTao Ma <tao.ma@oracle.com>
Signed-off-by: NJoel Becker <joel.becker@oracle.com>

fs/ocfs2/dir.c

@@ -2697,7 +2697,7 @@ static int ocfs2_dx_dir_index_block(struct inode *dir,
 				    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;

fs/ocfs2/suballoc.c

@@ -2213,7 +2213,7 @@ static int ocfs2_get_suballoc_slot_bit(struct ocfs2_super *osb, u64 blkno,
 		goto bail;
 	}
 
-	if (le16_to_cpu(inode_fe->i_suballoc_slot) != OCFS2_INVALID_SLOT &&
+	if (le16_to_cpu(inode_fe->i_suballoc_slot) != (u16)OCFS2_INVALID_SLOT &&
 	    (u32)le16_to_cpu(inode_fe->i_suballoc_slot) > osb->max_slots - 1) {
 		mlog(ML_ERROR, "inode %llu has invalid suballoc slot %u\n",
 		     blkno, (u32)le16_to_cpu(inode_fe->i_suballoc_slot));