Removed unnecessary turnloss when declining to memorise a spell. Also removed

turnloss when trying to memorise spells that you already know, or that are too high-level, or need too many slots.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@1559 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on June 8, 2007
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