Fix bug caught by MSVC compiler.

(!expr == foo) is not the same as (expr != foo)

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@3569 c06c8d41-db1a-0410-9941-cceddc491573

Created by  pauldubois  on March 9, 2008
3X5BATS2ME2B46CLUQMAIWX47C3B4X3V6I5E2NCANA3VAZAHMMHAC
In channels
main
Change contents