than assuming the player is always the source.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@9587 c06c8d41-db1a-0410-9941-cceddc491573
4AJIQJFO4WANGKVSUMXST2TDBXJWUJRMXSPHAECWSTXWQMBF4DBQC
U5OV6VLITTBZVEQ4UFKVER5V7JI4Z7L4CF5ALYVEC375UN56LVCQC
NMHMXEIDG3HMNWWQHCUUUC64SAQ733NVXSEPHP3WCFGEB2P35LBAC
K2CS6TCX2NDVL2ASEHGP4J4K4IJ6FP3ANNKTSIWVG43HPYSBX6ZQC
behaviour_event(monster, ME_ALERT, MHITYOU);
if (attacker != NULL) behaviour_event(monster, ME_ALERT, attacker->mindex());
if (attacker != NULL)
behaviour_event(monster, ME_ALERT, attacker->mindex());