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, 2 insertions, 2 deletions

diff --git a/source/blender/editors/gpencil/gpencil_fill.c b/source/blender/editors/gpencil/gpencil_fill.c
index e26acb76a51..680568a96c5 100644
--- a/source/blender/editors/gpencil/gpencil_fill.c
+++ b/source/blender/editors/gpencil/gpencil_fill.c
@@ -1124,9 +1124,9 @@ static void gpencil_fill_exit(bContext *C, wmOperator *op)
 
 		/* delete temp image */
 		if (tgpf->ima) {
-			for (Image *ima = bmain->image.first; ima; ima = ima->id.next) {
+			for (Image *ima = bmain->images.first; ima; ima = ima->id.next) {
 				if (ima == tgpf->ima) {
-					BLI_remlink(&bmain->image, ima);
+					BLI_remlink(&bmain->images, ima);
 					BKE_image_free(tgpf->ima);
 					MEM_SAFE_FREE(tgpf->ima);
 					break;