BETA: Fix for custom buff display ID and level.

Reported by: Cresceus, Hyrelius
Patch by: snacks
Reviewed by: Zoey76

git-svn-id: http://svn.l2jserver.com/branches/unstable/L2J_Server_BETA@6352 d34dfa0f-f91c-0410-86dd-cf06f19dd0ad