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/sculpt_paint/paint_image_proj.c b/source/blender/editors/sculpt_paint/paint_image_proj.c
index e26d9b1ef9d..f8a2259d4a5 100644
--- a/source/blender/editors/sculpt_paint/paint_image_proj.c
+++ b/source/blender/editors/sculpt_paint/paint_image_proj.c
@@ -5704,7 +5704,7 @@ void paint_proj_stroke_done(void *ps_handle_p)
 /* use project paint to re-apply an image */
 static int texture_paint_camera_project_exec(bContext *C, wmOperator *op)
 {
-	Image *image = BLI_findlink(&CTX_data_main(C)->image, RNA_enum_get(op->ptr, "image"));
+	Image *image = BLI_findlink(&CTX_data_main(C)->images, RNA_enum_get(op->ptr, "image"));
 	Scene *scene = CTX_data_scene(C);
 	ViewLayer *view_layer = CTX_data_view_layer(C);
 	ProjPaintState ps = {NULL};