git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5781 c06c8d41-db1a-0410-9941-cceddc491573
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you.piety = 100;
you.piety = (MAX_PIETY / 2);
const bool good = you.piety >= 100;
const bool good = you.piety > (MAX_PIETY / 2);
you.piety = 100 + (good ? size : -size);
you.piety = (MAX_PIETY / 2) + (good ? size : -size);