Fix T75680: Nodegroup user count increased when file saved in edit group mode.

This editor's code was a bit schizophrenic, some parts considering its
nodetree usages as real refcounted ones, others, as shallow 'user one'
ones...

Editors should not be real ID users anyway, unless there are *very* good
reasons for it, so swich it to fully 'shallow' usage now.

2 files changed, 6 insertions, 6 deletions

diff --git a/source/blender/blenkernel/intern/lib_query.c b/source/blender/blenkernel/intern/lib_query.c
index 9c0fa33157c..4ffdcf14fa7 100644
--- a/source/blender/blenkernel/intern/lib_query.c
+++ b/source/blender/blenkernel/intern/lib_query.c
@@ -492,16 +492,17 @@ static void library_foreach_screen_area(LibraryForeachIDData *data, ScrArea *are
         FOREACH_CALLBACK_INVOKE_ID(data, snode->from, IDWALK_CB_NOP);
 
         FOREACH_CALLBACK_INVOKE(
-            data, snode->nodetree, is_private_nodetree ? IDWALK_CB_EMBEDDED : IDWALK_CB_USER);
+            data, snode->nodetree, is_private_nodetree ? IDWALK_CB_EMBEDDED : IDWALK_CB_USER_ONE);
 
         for (path = snode->treepath.first; path; path = path->next) {
           if (path == snode->treepath.first) {
             /* first nodetree in path is same as snode->nodetree */
-            FOREACH_CALLBACK_INVOKE(
-                data, path->nodetree, is_private_nodetree ? IDWALK_CB_EMBEDDED : IDWALK_CB_NOP);
+            FOREACH_CALLBACK_INVOKE(data,
+                                    path->nodetree,
+                                    is_private_nodetree ? IDWALK_CB_EMBEDDED : IDWALK_CB_USER_ONE);
           }
           else {
-            FOREACH_CALLBACK_INVOKE(data, path->nodetree, IDWALK_CB_USER);
+            FOREACH_CALLBACK_INVOKE(data, path->nodetree, IDWALK_CB_USER_ONE);
           }
 
           if (path->nodetree == NULL) {
diff --git a/source/blender/editors/space_node/space_node.c b/source/blender/editors/space_node/space_node.c
index d682cab7293..b6ee393b991 100644
--- a/source/blender/editors/space_node/space_node.c
+++ b/source/blender/editors/space_node/space_node.c
@@ -890,8 +890,7 @@ static void node_id_remap(ScrArea *UNUSED(area), SpaceLink *slink, ID *old_id, I
     for (path = snode->treepath.first; path; path = path->next) {
       if ((ID *)path->nodetree == old_id) {
         path->nodetree = (bNodeTree *)new_id;
-        id_us_min(old_id);
-        id_us_plus(new_id);
+        id_us_ensure_real(new_id);
       }
       if (path == snode->treepath.first) {
         /* first nodetree in path is same as snode->nodetree */