Cleanup: use plural names for Main lists

Convention was not to but after discussion on 918941483f7e we agree its
best to change the convention.

Names now mostly follow RNA.

Some exceptions:

- Use 'nodetrees' instead of 'nodegroups'
  since the struct is called NodeTree.
- Use 'gpencils' instead of 'grease_pencil'
  since 'gpencil' is a common abbreviation in the C code.

Other exceptions:

- Leave 'wm' as it's a list of one.
- Leave 'ipo' as is for versioning.

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/editors/space_node/node_relationships.c b/source/blender/editors/space_node/node_relationships.c
index 87e6a7b82a8..e0fce2a5367 100644
--- a/source/blender/editors/space_node/node_relationships.c
+++ b/source/blender/editors/space_node/node_relationships.c
@@ -129,7 +129,7 @@ static bool node_group_has_output(Main *bmain, bNode *node)
 	if (ntree == NULL) {
 		return false;
 	}
-	BKE_main_id_tag_listbase(&bmain->nodetree, LIB_TAG_DOIT, false);
+	BKE_main_id_tag_listbase(&bmain->nodetrees, LIB_TAG_DOIT, false);
 	return node_group_has_output_dfs(node);
 }