Revert previous change, as setting the beam range to -2 is an

intentional bug trap.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8278 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on January 6, 2009
AHWUYPYI4LDCHSYMAKZIRDE5QVMOXFRYOQURKJJVN6K72DYYI54AC
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