Fix wrong shadow terminator geometry offset for instances

Must take into account SD_OBJECT_TRANSFORM_APPLIED to determine if the normal
was already in world space.

Differential Revision: https://developer.blender.org/D13639

intern/cycles/kernel/light/sample.h

@@ -148,7 +148,9 @@ ccl_device_inline float3 shadow_ray_smooth_surface_offset(
   float3 P = V[0] * u + V[1] * v + V[2] * w; /* Local space */
   float3 n = N[0] * u + N[1] * v + N[2] * w; /* We get away without normalization */
 
-  object_normal_transform(kg, sd, &n); /* Normal x scale, world space */
+  if (!(sd->object_flag & SD_OBJECT_TRANSFORM_APPLIED)) {
+    object_normal_transform(kg, sd, &n); /* Normal x scale, world space */
+  }
 
   /* Parabolic approximation */
   float a = dot(N[2] - N[0], V[0] - V[2]);