ext2fs: fix potential null dereference in utf8nlookup

Delay the access of data->offset until after the null check.  This was
reported by 0-day on the kernel version of the script.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
1 file changed