parsing a mark as a classid allows for acceptance of strange
informal input.

cheers,
jamal
commit aad0da6507ff8a95a63ed8e529c05f52be5b0e75
Author: Jamal Hadi Salim <hadi@cyberus.ca>
Date:   Mon Feb 15 06:45:29 2010 -0500

    skbedit: use get_u32 for parsing mark

    get_u32 is the more appropriate parser for a mark.
Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>