Alembic: avoid crash when Cycles is not enabled

The Alembic/CacheFile modifier supports Cycles procedurals when Cycles
is configured to use experimental features; the check for this would
segfault on builds with `WITH_CYCLES=OFF`. This is now fixed by adding
an extra NULL check.

1 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/scene.c b/source/blender/blenkernel/intern/scene.c
index a9a8cd93b1d..397bd430fd9 100644
--- a/source/blender/blenkernel/intern/scene.c
+++ b/source/blender/blenkernel/intern/scene.c
@@ -2787,6 +2787,12 @@ bool BKE_scene_uses_cycles_experimental_features(Scene *scene)
   PointerRNA scene_ptr;
   RNA_id_pointer_create(&scene->id, &scene_ptr);
   PointerRNA cycles_ptr = RNA_pointer_get(&scene_ptr, "cycles");
+
+  if (RNA_pointer_is_null(&cycles_ptr)) {
+    /* The pointer only exists if Cycles is enabled. */
+    return false;
+  }
+
   return RNA_enum_get(&cycles_ptr, "feature_set") == CYCLES_FEATURES_EXPERIMENTAL;
 }