Fixed a problem in Film::GetOutput<float>() when not having channel_RADIANCE_PER_PIXEL_NORMALIZEDs or channel_RADIANCE_PER_SCREEN_NORMALIZEDs buffers
Fixed a problem in Film::GetOutput<float>() when not having channel_RADIANCE_PER_PIXEL_NORMALIZEDs or channel_RADIANCE_PER_SCREEN_NORMALIZEDs buffers

DavidBluecame/LuxRays,DavidBluecame/LuxRays,DavidBluecame/LuxRays