message: fix point-lights which broke recently.
  The faulty commit was:
  commit
  Author: Mathias Agopian
  Date:   Fri Oct 29 12:03:14 2021 -0700
  Fix very narrow spotlight lighting and other minor issues
diff: @@ -572,9 +572,13 @@ void Froxelizer::froxelizeLoop(FEngine& engine,
  .position = (camera.view * float4{ spheres[j].xyz, 1 }).xyz, // to view-space
  .cosSqr = std::min(maxCosSquared, lcm.getCosOuterSquared(li)), // spot only
  .axis = vn * directions[j], // spot only
  - .invSin = std::min(maxInvSin, lcm.getSinInverse(li)), // spot only
  + .invSin = lcm.getSinInverse(li), // spot only
  .radius = spheres[j].w,
  };
  + // infinity means "pointlight"
  + if (light.invSin != std::numeric_limits<float>::infinity()) {
  + light.invSin = std::min(maxInvSin, light.invSin);
  + }
  const size_t group = i % GROUP_COUNT;
  const size_t bit = i / GROUP_COUNT;
  