Fix loading paletted TGA images

[andrey-budko]

See #144

[sezero]

Thanks

[vsonnier]

@sezero : #144 image format trouble originated because people wanted to have (erroneously) more compact images on that project without using .png, partly I suppose because I suggested on Slipseer to keep TGA for QS compatibility.

As it happens, all the other QS descendants already support the other formats .png, .jpg so would it not be better for QS to have this support as well, backporting from vk from instance ? (it implies using stb_image though)

vkQuake itself stole it from Ironwail some time ago, BTW.

I can try if you are interested.

[sezero]

all the other QS descendants already support the other formats .png, .jpg so would it not be better for QS to have this support as well, backporting from vk from instance ?

I'll look at it some time. Thanks.