Blender Git Loki

Fix T74063: EEVEE Render Passes

Cycles recently fixed this issue, EEVEE needed to be adapted to output
similar results in the light passes.

This patch implements cycles `safe_divide_even_color` function to a GLSL
function that will be used when extracting the light passes.

Reviewed By: fclem

Differential Revision: https://developer.blender.org/D6948