build fails on OS X

the ui package fails to build on OS X (trunk.) i did not bother
testing 1.7. this has to do with the way a file path is regex'ed.
not sure if i should have opened a ticket or not, and was recommended
i post here. from the looks this issue probably effects all *nix's as
they use / instead of \ for path seperator. here is a fix for the
issue:
http://echo.shellfx.net/~motion/ui_build_on_unix.diff