Allow waypoints to be deleted (Sigurd).

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@1287 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on April 11, 2007
WX2VFNANQZ3IRHBXSLKJT3G3OAQREAZISXLOTG6JO7KXFBHQFOYAC
Change contents