Added a sanity check for followers to prevent frozen monsters (cbus). Still need to figure out why monsters are getting marked as followers when they shouldn't.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@2241 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on September 28, 2007
PES2QAPAJTLHZORDXNJWKK4VWRDCGXMOVVFI2TQALCPB5JUPHCVQC
Change contents