Don't do anything for more() or mesclr() if the game has crashed (they might

get called during crash debug dumping from debug_item_scan() or debug_mons_scan() )

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8543 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on January 18, 2009
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