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/makesrna/intern/rna_color.c b/source/blender/makesrna/intern/rna_color.c
index beda3ebb7b8..61c2600a021 100644
--- a/source/blender/makesrna/intern/rna_color.c
+++ b/source/blender/makesrna/intern/rna_color.c
@@ -424,7 +424,7 @@ static void rna_ColorManagedDisplaySettings_display_device_update(Main *bmain, S
 		WM_main_add_notifier(NC_SCENE | ND_SEQUENCER, NULL);
 
 		/* Color management can be baked into shaders, need to refresh. */
-		for (Material *ma = bmain->mat.first; ma; ma = ma->id.next) {
+		for (Material *ma = bmain->materials.first; ma; ma = ma->id.next) {
 			DEG_id_tag_update(&ma->id, ID_RECALC_COPY_ON_WRITE);
 		}
 	}