Fix Edwin VanCleefs

Summon allies only once because two spawns are already available on aggro

Signed-off-by: Xfurry <xfurry@scriptdev2.com>

(based on commit ACID WOTLK[Fix Edwin VanCleefs] - d0c0748)

Signed-off-by: Xfurry <xfurry@scriptdev2.com>