BETA: Fixed NPE in L2Attackable.
	* Reported by: lucan
	* Reviewed by: xban1x, Nos, jurchiks, Zoey76
	* Patch by: Nos

git-svn-id: http://svn.l2jserver.com/branches/unstable/L2J_Server_BETA@6168 d34dfa0f-f91c-0410-86dd-cf06f19dd0ad