for my code refactoring.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@2103 c06c8d41-db1a-0410-9941-cceddc491573
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SVY2PTCLXR3KNPQAWXVXTTGCC5DR334HOAKHYO3VDDRWM2BWMALAC
* Modified for Crawl Reference by $Author: j-p-e-g $ on $Date: 2007-09-03 06:41:30 -0700 (Mon, 03 Sep 2007) $
* Modified for Crawl Reference by $Author$ on $Date$
* Modified for Crawl Reference by $Author: j-p-e-g $ on $Date: 2007-09-10 11:21:32 -0700 (Mon, 10 Sep 2007) $
* Modified for Crawl Reference by $Author: j-p-e-g $ on $Date: 2007-09-02 05:40:44 -0700 (Sun, 02 Sep 2007) $