The royal jelly's death triggers wall change even if it is off-level. Also fixed being able to lose the royal jelly when banishing it and crash when killing the royal jelly in the Abyss.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@4030 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on April 1, 2008
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