Depsgraph: Fix copy-on-write assert when freeing Freestyle config

We were bumping user count when duplicating viewlayer and its freestyleconfig
depending on the flag, however when freeing we were always decreasing user
count.

This fixes this and get rid of the assert when running:
`--factory-startup --enable-copy-on-write`

And closing Blender.

1 files changed, 7 insertions, 3 deletions

diff --git a/source/blender/blenkernel/intern/freestyle.c b/source/blender/blenkernel/intern/freestyle.c
index 686fe3bda93..b656d2cf7c0 100644
--- a/source/blender/blenkernel/intern/freestyle.c
+++ b/source/blender/blenkernel/intern/freestyle.c
@@ -61,17 +61,21 @@ void BKE_freestyle_config_init(FreestyleConfig *config)
 	BLI_listbase_clear(&config->linesets);
 }
 
-void BKE_freestyle_config_free(FreestyleConfig *config)
+void BKE_freestyle_config_free(FreestyleConfig *config, const bool do_id_user)
 {
 	FreestyleLineSet *lineset;
 
 	for (lineset = (FreestyleLineSet *)config->linesets.first; lineset; lineset = lineset->next) {
 		if (lineset->group) {
-			id_us_min(&lineset->group->id);
+			if (do_id_user) {
+				id_us_min(&lineset->group->id);
+			}
 			lineset->group = NULL;
 		}
 		if (lineset->linestyle) {
-			id_us_min(&lineset->linestyle->id);
+			if (do_id_user) {
+				id_us_min(&lineset->linestyle->id);
+			}
 			lineset->linestyle = NULL;
 		}
 	}