Clean up dolinks.sh some more: make it check for directories, not

symlinks, as domake.sh does.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@3203 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on January 5, 2008
KMIUNF55RMOTARLD6QNEYOPE2UFFRBZ6KAVQ6PDZAV2HCSBYDOXAC
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