Self targeted visible beams are seen, even though they don't leave a visible

path.

Self targeted beams have a "path" consisting soley of the source square.

path_taken() is reset at the start of polt::fire()

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8228 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on January 4, 2009
SKIHTFLZCN33YOLY6DBH5AD45EIUFX3CS44CMITAP7JVHRZN5RSQC
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