[Bf-blender-cvs] [e43e8f09bb1] geometry-nodes-level-set-nodes: Fix compile error

[Hans Goudey]

Commit: e43e8f09bb18e1ea9fb2ec1df1eaa0e870990752
Author: Hans Goudey
Date:   Fri Aug 13 09:30:23 2021 -0500
Branches: geometry-nodes-level-set-nodes
https://developer.blender.org/rBe43e8f09bb18e1ea9fb2ec1df1eaa0e870990752

Fix compile error

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M	source/blender/nodes/geometry/nodes/node_geo_level_set_to_fog_volume.cc

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diff --git a/source/blender/nodes/geometry/nodes/node_geo_level_set_to_fog_volume.cc b/source/blender/nodes/geometry/nodes/node_geo_level_set_to_fog_volume.cc
index a9aee445cd9..d6a930be2dd 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_level_set_to_fog_volume.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_level_set_to_fog_volume.cc
@@ -63,7 +63,7 @@ static void level_set_to_fog_volume(Volume &volume, const GeoNodeExecParams &par
 
       const float density = params.get_input<float>("Density");
       if (density != 1.0f) {
-        openvdb::tools::foreach (grid->beginValueOn(),
+        openvdb::tools::foreach (grid.beginValueOn(),
                                  [&](const openvdb::FloatGrid::ValueOnIter &iter) {
                                    iter.modifyValue([&](float &value) { value *= density; });
                                  });