when curves draw as derived meshes, check their face count rather then if the display list has faces.

source/blender/editors/space_view3d/drawobject.c

@@ -2984,7 +2984,7 @@ static int drawCurveDerivedMesh(Scene *scene, View3D *v3d, RegionView3D *rv3d, B
 		return 1;
 	}
 
-	if(dt>OB_WIRE && displist_has_faces(&cu->disp)!=0) {
+	if(dt>OB_WIRE && dm->getNumFaces(dm)) {
 		int glsl = draw_glsl_material(scene, ob, v3d, dt);
 		GPU_begin_object_materials(v3d, rv3d, scene, ob, glsl, NULL);