Mapping of Live input

[hamish]

I think I've found a bug when using a live input texture from a Decklink card. Using any mapping setting other than 'wrap' leads to problems. In border, I end up seeing nothing but border, in mirror everything is upside down and in clamp, everything is streched heavily. The strange part is that the same scene on an identical machine except for a Deltacast capture card behaves as I would expect.