When creating a filesystem with inodes bigger than 128 bytes, mke2fs fails
to clear out bytes beyond EXT3_GOOD_OLD_INODE_SIZE in all inodes it creates
(the journal, the filesystem root, and lost+found).  We would require a
zeroed-out i_extra_isize field but we don't get it, so disallow in-inode
attributes for those inodes.

Add an i_extra_isize sanity check.
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>