Get the arena tied-round and giant spore logic working again, partially by

making self-initiated explosions happen directly in melee_attack::mons_self_destructs() and by calling arena_monster_died() after the spore has exploded instead of before.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8268 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on January 6, 2009
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