Fix #130979: Curve object edit mode crash with evaluated mesh

Currently the text measure stats overlay is written to assume there
is an original edit mesh. It has to be disabled when that isn't the case.

source/blender/draw/intern/draw_manager_text.cc

@@ -267,7 +267,13 @@ void DRW_text_edit_mesh_measure_stats(const ARegion *region,
    */
   const short txt_flag = DRW_TEXT_CACHE_GLOBALSPACE;
   const Mesh *mesh = BKE_object_get_editmesh_eval_cage(ob);
+  if (!mesh) {
+    return;
+  }
   const BMEditMesh *em = mesh->runtime->edit_mesh.get();
+  if (!BKE_editmesh_eval_orig_map_available(*mesh, BKE_object_get_pre_modified_mesh(ob))) {
+    return;
+  }
   char numstr[32];                      /* Stores the measurement display text here */
   const char *conv_float;               /* Use a float conversion matching the grid size */
   blender::uchar4 col = {0, 0, 0, 255}; /* color of the text to draw */