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

3 files changed, 3 insertions, 3 deletions

diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index 84625fea6fc..7dd35203a89 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -2913,7 +2913,7 @@ static const char *dataname(short id_code)
       return "Data from MA";
     case ID_TE:
       return "Data from TE";
-    case ID_CU:
+    case ID_CU_LEGACY:
       return "Data from CU";
     case ID_GR:
       return "Data from GR";
diff --git a/source/blender/blenloader/intern/versioning_250.c b/source/blender/blenloader/intern/versioning_250.c
index 6bf3402eafe..ac59e3efc72 100644
--- a/source/blender/blenloader/intern/versioning_250.c
+++ b/source/blender/blenloader/intern/versioning_250.c
@@ -1644,7 +1644,7 @@ void blo_do_versions_250(FileData *fd, Library *lib, Main *bmain)
             BLI_addtail((ListBase *)&ob->modifiers, lmd);
             ob->partype = PAROBJECT;
           }
-          else if (parent->type == OB_CURVE && ob->partype == PARCURVE) {
+          else if (parent->type == OB_CURVES_LEGACY && ob->partype == PARCURVE) {
             CurveModifierData *cmd;
 
             cmd = (CurveModifierData *)BKE_modifier_new(eModifierType_Curve);
diff --git a/source/blender/blenloader/intern/versioning_legacy.c b/source/blender/blenloader/intern/versioning_legacy.c
index cd4efa95d5e..2908b2b151b 100644
--- a/source/blender/blenloader/intern/versioning_legacy.c
+++ b/source/blender/blenloader/intern/versioning_legacy.c
@@ -1356,7 +1356,7 @@ void blo_do_versions_pre250(FileData *fd, Library *lib, Main *bmain)
           bFollowPathConstraint *data = con->data;
           Object *obc = blo_do_versions_newlibadr(fd, lib, data->tar);
 
-          if (obc && obc->type == OB_CURVE) {
+          if (obc && obc->type == OB_CURVES_LEGACY) {
             Curve *cu = blo_do_versions_newlibadr(fd, lib, obc->data);
             if (cu) {
               cu->flag |= CU_PATH;