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, 3 insertions, 3 deletions

diff --git a/source/blender/blenkernel/intern/constraint.c b/source/blender/blenkernel/intern/constraint.c
index 69002a71f1d..47669387fd1 100644
--- a/source/blender/blenkernel/intern/constraint.c
+++ b/source/blender/blenkernel/intern/constraint.c
@@ -1493,7 +1493,7 @@ static void followpath_get_tarmat(struct Depsgraph *UNUSED(depsgraph),
 {
   bFollowPathConstraint *data = con->data;
 
-  if (VALID_CONS_TARGET(ct) && (ct->tar->type == OB_CURVE)) {
+  if (VALID_CONS_TARGET(ct) && (ct->tar->type == OB_CURVES_LEGACY)) {
     Curve *cu = ct->tar->data;
     float vec[4], dir[3], radius;
     float curvetime;
@@ -2479,7 +2479,7 @@ static void pycon_get_tarmat(struct Depsgraph *UNUSED(depsgraph),
 #endif
 
   if (VALID_CONS_TARGET(ct)) {
-    if (ct->tar->type == OB_CURVE && ct->tar->runtime.curve_cache == NULL) {
+    if (ct->tar->type == OB_CURVES_LEGACY && ct->tar->runtime.curve_cache == NULL) {
       unit_m4(ct->matrix);
       return;
     }
@@ -3867,7 +3867,7 @@ static void clampto_evaluate(bConstraint *con, bConstraintOb *cob, ListBase *tar
   bConstraintTarget *ct = targets->first;
 
   /* only evaluate if there is a target and it is a curve */
-  if (VALID_CONS_TARGET(ct) && (ct->tar->type == OB_CURVE)) {
+  if (VALID_CONS_TARGET(ct) && (ct->tar->type == OB_CURVES_LEGACY)) {
     float obmat[4][4], ownLoc[3];
     float curveMin[3], curveMax[3];
     float targetMatrix[4][4];