After some more thought, make draining and vampiric attacks (both

weapons and monster attacks, not just the latter) take full negative energy resistance into account.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8556 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on January 18, 2009
MOG3BEJGUP4PY6OP3UEMAJD5J6LD2SDCMN4264RJ3M7DOZE7336QC
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