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

4 files changed, 8 insertions, 8 deletions

diff --git a/source/blender/gpencil_modifiers/intern/MOD_gpencil_util.c b/source/blender/gpencil_modifiers/intern/MOD_gpencil_util.c
index d59d2cb52fc..bd8fd9f72ad 100644
--- a/source/blender/gpencil_modifiers/intern/MOD_gpencil_util.c
+++ b/source/blender/gpencil_modifiers/intern/MOD_gpencil_util.c
@@ -182,7 +182,7 @@ void generic_bake_deform_stroke(
   LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
     LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
       if (retime) {
-        CFRA = gpf->framenum;
+        scene->r.cfra = gpf->framenum;
         BKE_scene_graph_update_for_newframe(depsgraph);
       }
       LISTBASE_FOREACH (bGPDstroke *, gps, &gpf->strokes) {
@@ -193,7 +193,7 @@ void generic_bake_deform_stroke(
 
   /* Return frame state and DB to original state. */
   if (retime) {
-    CFRA = oldframe;
+    scene->r.cfra = oldframe;
     BKE_scene_graph_update_for_newframe(depsgraph);
   }
 }
diff --git a/source/blender/gpencil_modifiers/intern/MOD_gpencillattice.c b/source/blender/gpencil_modifiers/intern/MOD_gpencillattice.c
index 96e649bf7a1..30f1a004338 100644
--- a/source/blender/gpencil_modifiers/intern/MOD_gpencillattice.c
+++ b/source/blender/gpencil_modifiers/intern/MOD_gpencillattice.c
@@ -129,7 +129,7 @@ static void bakeModifier(Main *UNUSED(bmain),
       /* Apply lattice effects on this frame
        * NOTE: this assumes that we don't want lattice animation on non-keyframed frames.
        */
-      CFRA = gpf->framenum;
+      scene->r.cfra = gpf->framenum;
       BKE_scene_graph_update_for_newframe(depsgraph);
 
       /* Recalculate lattice data. */
@@ -153,7 +153,7 @@ static void bakeModifier(Main *UNUSED(bmain),
   }
 
   /* Return frame state and DB to original state. */
-  CFRA = oldframe;
+  scene->r.cfra = oldframe;
   BKE_scene_graph_update_for_newframe(depsgraph);
 }
 
diff --git a/source/blender/gpencil_modifiers/intern/MOD_gpencilmirror.c b/source/blender/gpencil_modifiers/intern/MOD_gpencilmirror.c
index df66251159c..1d62e930caa 100644
--- a/source/blender/gpencil_modifiers/intern/MOD_gpencilmirror.c
+++ b/source/blender/gpencil_modifiers/intern/MOD_gpencilmirror.c
@@ -163,7 +163,7 @@ static void bakeModifier(Main *UNUSED(bmain),
   LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
     LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
       /* apply mirror effects on this frame */
-      CFRA = gpf->framenum;
+      scene->r.cfra = gpf->framenum;
       BKE_scene_graph_update_for_newframe(depsgraph);
 
       /* compute mirror effects on this frame */
@@ -172,7 +172,7 @@ static void bakeModifier(Main *UNUSED(bmain),
   }
 
   /* return frame state and DB to original state */
-  CFRA = oldframe;
+  scene->r.cfra = oldframe;
   BKE_scene_graph_update_for_newframe(depsgraph);
 }
 
diff --git a/source/blender/gpencil_modifiers/intern/MOD_gpencilshrinkwrap.c b/source/blender/gpencil_modifiers/intern/MOD_gpencilshrinkwrap.c
index cd2373dcb26..017287239ea 100644
--- a/source/blender/gpencil_modifiers/intern/MOD_gpencilshrinkwrap.c
+++ b/source/blender/gpencil_modifiers/intern/MOD_gpencilshrinkwrap.c
@@ -135,7 +135,7 @@ static void bakeModifier(Main *UNUSED(bmain),
   LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
     LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
       /* Apply shrinkwrap effects on this frame. */
-      CFRA = gpf->framenum;
+      scene->r.cfra = gpf->framenum;
       BKE_scene_graph_update_for_newframe(depsgraph);
 
       /* Recalculate shrinkwrap data. */
@@ -163,7 +163,7 @@ static void bakeModifier(Main *UNUSED(bmain),
   }
 
   /* Return frame state and DB to original state. */
-  CFRA = oldframe;
+  scene->r.cfra = oldframe;
   BKE_scene_graph_update_for_newframe(depsgraph);
 }