Merge branch 'blender-v2.92-release'

source/blender/blenkernel/intern/customdata.c

@@ -4272,6 +4272,18 @@ bool CustomData_layertype_is_singleton(int type)
   return typeInfo->defaultname == NULL;
 }
 
+/**
+ * Has dynamically allocated members.
+ * This is useful to know if operations such as #memcmp are
+ * valid when comparing data from two layers.
+ */
+bool CustomData_layertype_is_dynamic(int type)
+{
+  const LayerTypeInfo *typeInfo = layerType_getInfo(type);
+
+  return (typeInfo->free != NULL);
+}
+
 /**
  * \return Maximum number of layers of given \a type, -1 means 'no limit'.
  */