[Bf-blender-cvs] [e12e55ae259] temp-modifiers-instancing: fix crash when Group Output is not connected

[Jacques Lucke]

Commit: e12e55ae259c5d0c682c160d1a97d67c1603bb35
Author: Jacques Lucke
Date:   Wed Nov 11 18:41:30 2020 +0100
Branches: temp-modifiers-instancing
https://developer.blender.org/rBe12e55ae259c5d0c682c160d1a97d67c1603bb35

fix crash when Group Output is not connected

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

M	source/blender/modifiers/intern/MOD_nodes.cc

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

diff --git a/source/blender/modifiers/intern/MOD_nodes.cc b/source/blender/modifiers/intern/MOD_nodes.cc
index 60b346671c3..1791ab1fcc6 100644
--- a/source/blender/modifiers/intern/MOD_nodes.cc
+++ b/source/blender/modifiers/intern/MOD_nodes.cc
@@ -853,6 +853,9 @@ static Mesh *modifyMesh(ModifierData *md, const ModifierEvalContext *ctx, Mesh *
   GeometrySetPtr input_geometry_set = GeometrySet::create_with_mesh(
       mesh, GeometryOwnershipType::Editable);
   GeometrySetPtr output_geometry_set = modifyGeometry(md, ctx, std::move(input_geometry_set));
+  if (!output_geometry_set.has_value()) {
+    return BKE_mesh_new_nomain(0, 0, 0, 0, 0);
+  }
   Mesh *new_mesh = output_geometry_set->get_component_for_write<MeshComponent>().release();
   if (new_mesh == nullptr) {
     return BKE_mesh_new_nomain(0, 0, 0, 0, 0);