Fix #144258: Cycles: Subsurface scattering doesn't work with shadow linking

When shadow linking is enabled, `intersect_dedicated_light` is scheduled even
if the `PATH_RAY_SUBSURFACE` flag is set. This checks the flag and schedules
`intersect_subsurface` instead.

Pull Request: https://projects.blender.org/blender/blender/pulls/145621

intern/cycles/kernel/integrator/shade_surface.h

@@ -853,8 +853,8 @@ ccl_device_forceinline void integrator_shade_surface(KernelGlobals kg,
 
 #ifdef __SHADOW_LINKING__
   /* No need to cast shadow linking rays at a transparent bounce: the lights will be accumulated
-   * via the main path in this case. */
-  if ((continue_path_label & LABEL_TRANSPARENT) == 0) {
+   * via the main path in this case. BSSRDF bounces continue with intersect_subsurface. */
+  if ((continue_path_label & (LABEL_TRANSPARENT | LABEL_SUBSURFACE_SCATTER)) == 0) {
     if (shadow_linking_schedule_intersection_kernel<current_kernel>(kg, state)) {
       return;
     }