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, 3 insertions, 3 deletions

diff --git a/source/blender/editors/space_sequencer/sequencer_add.c b/source/blender/editors/space_sequencer/sequencer_add.c
index ba4ff6e82d7..b408369dc04 100644
--- a/source/blender/editors/space_sequencer/sequencer_add.c
+++ b/source/blender/editors/space_sequencer/sequencer_add.c
@@ -301,7 +301,7 @@ static int sequencer_add_scene_strip_exec(bContext *C, wmOperator *op)
 	start_frame = RNA_int_get(op->ptr, "frame_start");
 	channel = RNA_int_get(op->ptr, "channel");
 
-	sce_seq = BLI_findlink(&CTX_data_main(C)->scene, RNA_enum_get(op->ptr, "scene"));
+	sce_seq = BLI_findlink(&CTX_data_main(C)->scenes, RNA_enum_get(op->ptr, "scene"));
 
 	if (sce_seq == NULL) {
 		BKE_report(op->reports, RPT_ERROR, "Scene not found");
@@ -389,7 +389,7 @@ static int sequencer_add_movieclip_strip_exec(bContext *C, wmOperator *op)
 	start_frame = RNA_int_get(op->ptr, "frame_start");
 	channel = RNA_int_get(op->ptr, "channel");
 
-	clip = BLI_findlink(&CTX_data_main(C)->movieclip, RNA_enum_get(op->ptr, "clip"));
+	clip = BLI_findlink(&CTX_data_main(C)->movieclips, RNA_enum_get(op->ptr, "clip"));
 
 	if (clip == NULL) {
 		BKE_report(op->reports, RPT_ERROR, "Movie clip not found");
@@ -474,7 +474,7 @@ static int sequencer_add_mask_strip_exec(bContext *C, wmOperator *op)
 	start_frame = RNA_int_get(op->ptr, "frame_start");
 	channel = RNA_int_get(op->ptr, "channel");
 
-	mask = BLI_findlink(&CTX_data_main(C)->mask, RNA_enum_get(op->ptr, "mask"));
+	mask = BLI_findlink(&CTX_data_main(C)->masks, RNA_enum_get(op->ptr, "mask"));
 
 	if (mask == NULL) {
 		BKE_report(op->reports, RPT_ERROR, "Mask not found");