Properly treat "Summon Scorpions" as a no-op in setup_mons_cast().

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5849 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on June 15, 2008
WQ3E7DRK5K6UL6FZPDUQDEDDBP4ETYPORMHA3O5NYOPBKY2FDAIAC
Change contents