[2046134] Fixing segfault when random dracos are specified with 'nothing' as equipment.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@6830 c06c8d41-db1a-0410-9941-cceddc491573

Created by  ennewalker  on August 16, 2008
KSPB4TR7USO3VMFQ3UQTHHIZVGOHRUFNRPT736ABI6SAMSQ7RPGAC
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