Cleanup: Rename original curve object type enum

This commit renames enums related the "Curve" object type and ID type
to add `_LEGACY` to the end. The idea is to make our aspirations clearer
in the code and to avoid ambiguities between `CURVE` and `CURVES`.

Ref T95355

To summarize for the record, the plans are:
- In the short/medium term, replace the `Curve` object data type with
 `Curves`
- In the longer term (no immediate plans), use a proper data block for
  3D text and surfaces.

Differential Revision: https://developer.blender.org/D14114

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/editors/transform/transform_orientations.c b/source/blender/editors/transform/transform_orientations.c
index 6ca61d415ea..c0d943e17ee 100644
--- a/source/blender/editors/transform/transform_orientations.c
+++ b/source/blender/editors/transform/transform_orientations.c
@@ -350,7 +350,7 @@ bool BIF_createTransformOrientation(bContext *C,
       else if (obedit->type == OB_ARMATURE) {
         ts = createBoneSpace(C, reports, name, overwrite);
       }
-      else if (obedit->type == OB_CURVE) {
+      else if (obedit->type == OB_CURVES_LEGACY) {
         ts = createCurveSpace(C, reports, name, overwrite);
       }
     }
@@ -984,7 +984,7 @@ int getTransformOrientation_ex(ViewLayer *view_layer,
       negate_v3(plane);
 
     } /* end editmesh */
-    else if (ELEM(obedit->type, OB_CURVE, OB_SURF)) {
+    else if (ELEM(obedit->type, OB_CURVES_LEGACY, OB_SURF)) {
       Curve *cu = obedit->data;
       Nurb *nu = NULL;
       int a;