only on their visibility, ingoring if they were in LOS or not.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5495 c06c8d41-db1a-0410-9941-cceddc491573
PIWCQQ4A3SZPWPHWO4HTOAC6NSBP6SUCQKOBCZEGCF6BTMM2HA2QC
J6APXOT4QOGQFONWB7G546VTVF6QG42HVOROMHF7YBDJPR4K26OAC
K2CS6TCX2NDVL2ASEHGP4J4K4IJ6FP3ANNKTSIWVG43HPYSBX6ZQC
if (player_monster_visible(monster))
if (you.can_see(monster))