After some thought, for now, remove stupid undead not retaining

alternate weapons. With monsters::pickup_item(), they always seem to get missile weapons over melee weapons, and code in _handle_throw() makes all zombies unable to throw or shoot, so, effectively, they'll now always use melee and never switch weapons.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8666 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on January 21, 2009
VR4YHHEVUV2E7EDJXXECQ7YUEL2GA5PGZRDA5IZJRYYFVBOH32WQC
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