up the source accordingly.
At some point these warnings should be merged into the makefile system, but I don't have the will to merge them into the 3451351235 individual makefiles at the moment.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@12 c06c8d41-db1a-0410-9941-cceddc491573
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