Fix spot lights imported from glTF files. #21
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…ampler is updated correctly
Bring forward changes from dev
SomeNvidiaGuy
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Spot lights currently only work correctly if they have a non-zero radius. When exported from glTF they always have a radius of
0.0f(non-point shapes are not supported there).This PR adds some code to correctly handle spot lights with zero radius (similar to point lights with zero radius).