thcrap_configure: Add an error case if no games were found at all.
thcrap_configure: Add an error case if no games were found at all.

thpatch/thcrap,thpatch/thcrap,thpatch/thcrap,VBChunguk/thcrap,VBChunguk/thcrap,thpatch/thcrap,VBChunguk/thcrap,thpatch/thcrap