Small assorted harmless code cleanup tweaks before a round of cleanups aimed at fixing a few bugs in animation editor filtering.

source/blender/editors/animation/anim_channels_defines.c

@@ -2074,7 +2074,7 @@ static void dummy_olddraw_gpencil ()
 		case ANIMTYPE_GPDATABLOCK: /* gpencil datablock */
 		{
 			bGPdata *gpd = (bGPdata *)ale->data;
-			ScrArea *sa = (ScrArea *)ale->owner;
+			ScrArea *sa = (ScrArea *)ale->owner; // XXX depreceated...
 			
 			indent = 0;
 			group= 3;

source/blender/editors/animation/anim_channels_edit.c

@@ -1795,7 +1795,7 @@ static int mouse_anim_channels (bAnimContext *ac, float x, int channel_index, sh
 		case ANIMTYPE_GPLAYER:
 		{
 #if 0 // XXX future of this is unclear
-			bGPdata *gpd= (bGPdata *)ale->owner;
+			bGPdata *gpd= (bGPdata *)ale->owner; // xxx depreceated
 			bGPDlayer *gpl= (bGPDlayer *)ale->data;
 			
 			if (x >= (ACHANNEL_NAMEWIDTH-16)) {

source/blender/editors/space_nla/nla_channels.c

@@ -279,7 +279,7 @@ static int mouse_nla_channels (bAnimContext *ac, float x, int channel_index, sho
 			break;
 		case ANIMTYPE_NLAACTION:
 		{
-			AnimData *adt= BKE_animdata_from_id(ale->owner); /* this won't crash, right? */
+			AnimData *adt= BKE_animdata_from_id(ale->id);
 			
 			if (x >= (v2d->cur.xmax-NLACHANNEL_BUTTON_WIDTH)) {
 				if (nlaedit_is_tweakmode_on(ac) == 0) {