Fix 2164937: better necromancy miscast messaging.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@7256 c06c8d41-db1a-0410-9941-cceddc491573

Created by  haranp  on October 15, 2008
ETMGU6QJ37DEKIZKMZXDEO3GJ6F4WX5T7KQ52QK5XSABUZA2E5WQC
Change contents