Fix bug 2354889: if shallow water has its colour overriden, then make

items laying in it the same colour.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@7669 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on November 28, 2008
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