BETA: Minor typo in `L2Summon` preventing siege summons to attack doors and walls.

Reported by: pandragon, Konstantinos, Maui

git-svn-id: http://svn.l2jserver.com/branches/unstable/L2J_Server_BETA@6265 d34dfa0f-f91c-0410-86dd-cf06f19dd0ad