Add an identical SkipVariance function to make the code clearer.

widl: Add a type_memsize_and_alignment function to make it explicit where the alignment is truly needed.

Request method is determined by Wine on bind, so return success in this
function to make Gecko happy.

GL_VENDOR_ATI -> GL_VENDOR_FGLRX because it's much more specific. Besides, AMD
also works on the Mesa drivers.

Software adapters like the refrast also return a 0 PCI ID on Windows.