[Bf-blender-cvs] [25a1b27a93e] blender-v2.93-release: LineArt: Fix crash due to empty duplicollection.

[YimingWu]

Commit: 25a1b27a93ee406232194b2c09b0668c78209256
Author: YimingWu
Date:   Fri Jun 11 17:55:12 2021 +0800
Branches: blender-v2.93-release
https://developer.blender.org/rB25a1b27a93ee406232194b2c09b0668c78209256

LineArt: Fix crash due to empty duplicollection.

===================================================================

M	source/blender/gpencil_modifiers/intern/MOD_gpencillineart.c

===================================================================

diff --git a/source/blender/gpencil_modifiers/intern/MOD_gpencillineart.c b/source/blender/gpencil_modifiers/intern/MOD_gpencillineart.c
index c1a791d460b..7a6cefa4f0f 100644
--- a/source/blender/gpencil_modifiers/intern/MOD_gpencillineart.c
+++ b/source/blender/gpencil_modifiers/intern/MOD_gpencillineart.c
@@ -198,6 +198,9 @@ static void add_this_collection(Collection *c,
                                 const ModifierUpdateDepsgraphContext *ctx,
                                 const int mode)
 {
+  if (!c) {
+    return;
+  }
   FOREACH_COLLECTION_VISIBLE_OBJECT_RECURSIVE_BEGIN (c, ob, mode) {
     if (ELEM(ob->type, OB_MESH, OB_MBALL, OB_CURVE, OB_SURF, OB_FONT)) {
       if (ob->lineart.usage != OBJECT_LRT_EXCLUDE) {