Properly differentiate between blasts and bursts of hellfire in the beam

name, to avoid getting "killed with a hellfire" death messages.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@9232 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on February 26, 2009
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