Oops, overlooked that ench_countdown needs to be rescaled when a monster

gains or loses the slow or haste enchantments.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@2452 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on October 13, 2007
JPMNAPRVTMOIM62AD56L6MRBGJGNEF6GNLUXDFVOSZG3KU7BUGEQC
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