Fix T43273: vector math cross product inconsistent

GLSL missed the normalization step.

Reviewers: psy-fi, sergey, mont29

Reviewed By: mont29, sergey

Subscribers: mont29

Maniphest Tasks: T43273

Differential Revision: https://developer.blender.org/D1000

source/blender/gpu/shaders/gpu_shader_material.glsl

@@ -338,6 +338,7 @@ void vec_math_cross(vec3 v1, vec3 v2, out vec3 outvec, out float outval)
 {
 	outvec = cross(v1, v2);
 	outval = length(outvec);
+	outvec /= outval;
 }
 
 void vec_math_normalize(vec3 v, out vec3 outvec, out float outval)