Cleanup: Remove scene frame macros (`CFRA` et al.)

Removes the following macros for scene/render frame values:
- `CFRA`
- `SUBFRA`
- `SFRA`
- `EFRA`

These macros don't add much, other than saving a few characters when typing.
It's not immediately clear what they refer to, they just hide what they
actually access. Just be explicit and clear about that.
Plus these macros gave read and write access to the variables, so eyesores like
this would be done (eyesore because it looks like assigning to a constant):
```
CFRA = some_frame_nbr;
```

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D15311

1 files changed, 6 insertions, 6 deletions

diff --git a/source/blender/editors/transform/transform_convert_action.c b/source/blender/editors/transform/transform_convert_action.c
index ba62f6f1fea..71a78321e12 100644
--- a/source/blender/editors/transform/transform_convert_action.c
+++ b/source/blender/editors/transform/transform_convert_action.c
@@ -326,7 +326,7 @@ void createTransActionData(bContext *C, TransInfo *t)
 
   /* which side of the current frame should be allowed */
   if (t->mode == TFM_TIME_EXTEND) {
-    t->frame_side = transform_convert_frame_side_dir_get(t, (float)CFRA);
+    t->frame_side = transform_convert_frame_side_dir_get(t, (float)scene->r.cfra);
   }
   else {
     /* normal transform - both sides of current frame are considered */
@@ -341,10 +341,10 @@ void createTransActionData(bContext *C, TransInfo *t)
      * higher scaling ratios, but is faster than converting all points)
      */
     if (adt) {
-      cfra = BKE_nla_tweakedit_remap(adt, (float)CFRA, NLATIME_CONVERT_UNMAP);
+      cfra = BKE_nla_tweakedit_remap(adt, (float)scene->r.cfra, NLATIME_CONVERT_UNMAP);
     }
     else {
-      cfra = (float)CFRA;
+      cfra = (float)scene->r.cfra;
     }
 
     if (ELEM(ale->type, ANIMTYPE_FCURVE, ANIMTYPE_NLACURVE)) {
@@ -399,7 +399,7 @@ void createTransActionData(bContext *C, TransInfo *t)
       continue;
     }
 
-    cfra = (float)CFRA;
+    cfra = (float)scene->r.cfra;
 
     {
       AnimData *adt;
@@ -447,10 +447,10 @@ void createTransActionData(bContext *C, TransInfo *t)
 
       adt = ANIM_nla_mapping_get(&ac, ale);
       if (adt) {
-        cfra = BKE_nla_tweakedit_remap(adt, (float)CFRA, NLATIME_CONVERT_UNMAP);
+        cfra = BKE_nla_tweakedit_remap(adt, (float)scene->r.cfra, NLATIME_CONVERT_UNMAP);
       }
       else {
-        cfra = (float)CFRA;
+        cfra = (float)scene->r.cfra;
       }
 
       if (ale->type == ANIMTYPE_GPLAYER) {