Cleanup: Use const qualifier in modifier data copy

Fix possible overflow of Modifier UUID

The code prior this change was re-generating modifier's session UUID
prior to copying this id from the source. This approach has a higher
risk of modifiers session UUID to overflow and start colliding with
existing modifiers.

This change makes it so that modifier copy does not re-generated the
session UUID unless it is needed.

Differential Revision: https://developer.blender.org/D14125

1 files changed, 2 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_modifier.h b/source/blender/blenkernel/BKE_modifier.h
index 6df503153b9..acdca23b21c 100644
--- a/source/blender/blenkernel/BKE_modifier.h
+++ b/source/blender/blenkernel/BKE_modifier.h
@@ -409,6 +409,8 @@ void BKE_modifier_session_uuid_generate(struct ModifierData *md);
 
 bool BKE_modifier_unique_name(struct ListBase *modifiers, struct ModifierData *md);
 
+struct ModifierData *BKE_modifier_copy_ex(const struct ModifierData *md, int flag);
+
 /**
  * Callback's can use this to avoid copying every member.
  */