ocfs2: Fix up i_blocks calculation to know about holes

Older file systems which didn't support holes did a dumb calculation of
i_blocks based on i_size. This is no longer accurate, so fix things up to
take actual allocation into account.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index f516619..e34474c 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -216,7 +216,7 @@
 
 	mlog_entry_void();
 	i_size_write(inode, new_i_size);
-	inode->i_blocks = ocfs2_align_bytes_to_sectors(new_i_size);
+	inode->i_blocks = ocfs2_inode_sector_count(inode);
 	inode->i_ctime = inode->i_mtime = CURRENT_TIME;
 
 	status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);