[2010192] Fixing issue where cancelling a ranged attack (e.g. "Really fire on...?") wouldn't really cancel the attack. Also, s/beam_stopped/beam_cancelled/ for clarity.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@6409 c06c8d41-db1a-0410-9941-cceddc491573

Created by  ennewalker  on July 5, 2008
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