Revert "Forgottinated something"

This reverts commit 0f9da6dc6c8e74eebe164b8baa3fe529aedf75fc.
Revert "dir->i_size goodness"

This reverts commit 1adbd29ea18fe305a84cc54b4befae5f22889fc7.
Keep d_rec_len from getting longer than XIAFS_ZSIZE