Cleanup: Use const when retrieving custom data layers

Knowing when layers are retrieved for write access will be essential
when adding proper copy-on-write support. This commit makes that
clearer by adding `const` where the retrieved data is not modified.

Ref T95842

1 files changed, 1 insertions, 3 deletions

diff --git a/source/blender/modifiers/intern/MOD_weightvg_util.c b/source/blender/modifiers/intern/MOD_weightvg_util.c
index b251825cd95..acff66e74e4 100644
--- a/source/blender/modifiers/intern/MOD_weightvg_util.c
+++ b/source/blender/modifiers/intern/MOD_weightvg_util.c
@@ -206,8 +206,6 @@ void weightvg_do_mask(const ModifierEvalContext *ctx,
     MEM_freeN(tex_co);
   }
   else if ((ref_didx = BKE_id_defgroup_name_index(&mesh->id, defgrp_name)) != -1) {
-    MDeformVert *dvert = NULL;
-
     /* Check whether we want to set vgroup weights from a constant weight factor or a vertex
      * group.
      */
@@ -215,7 +213,7 @@ void weightvg_do_mask(const ModifierEvalContext *ctx,
 
     /* Proceed only if vgroup is valid, else use constant factor. */
     /* Get actual dverts (ie vertex group data). */
-    dvert = CustomData_get_layer(&mesh->vdata, CD_MDEFORMVERT);
+    const MDeformVert *dvert = CustomData_get_layer(&mesh->vdata, CD_MDEFORMVERT);
     /* Proceed only if vgroup is valid, else assume factor = O. */
     if (dvert == NULL) {
       return;