Cycles: Disable unused closure types when baking a specific component

When baking e.g. the Diffuse pass, use the existing filter logic to
disable glossy and transmission closures.

This reduces baking time and noise when baking individual components
of complex materials.

intern/cycles/blender/session.cpp

@@ -586,6 +586,10 @@ static bool bake_setup_pass(Scene *scene, const string &bake_type, const int bak
     use_indirect_light = filter_indirect;
     include_albedo = filter_color;
 
+    integrator->set_use_diffuse(bake_type == "DIFFUSE");
+    integrator->set_use_glossy(bake_type == "GLOSSY");
+    integrator->set_use_transmission(bake_type == "TRANSMISSION");
+
     if (bake_type == "DIFFUSE") {
       if (filter_direct && filter_indirect) {
         type = PASS_DIFFUSE;