[1943740] Fixing issue with odd tiles in Pan when saving and reloading.

Also, fixing misplaced viewwindow that was drawing the screen before the right tiles for that level were selected.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@4376 c06c8d41-db1a-0410-9941-cceddc491573

Created by  ennewalker  on April 19, 2008
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