vbo: Preserve vbo_save::no_current_update on primitive restart.

With this change we preserve the no_current_update property when we
observe a glPrimitiveRestart call. That means that we now also get the
no_current_update optimization for display lists that are made
out of indexed draws using primitive restart.

Reviewed-by: Brian Paul <brianp@vmware.com>
Signed-off-by: Mathias Fröhlich <Mathias.Froehlich@web.de>

src/mesa/vbo/vbo_save_api.c

@@ -1277,10 +1277,11 @@ _save_PrimitiveRestartNV(void)
    } else {
       /* get current primitive mode */
       GLenum curPrim = save->prims[save->prim_count - 1].mode;
+      bool no_current_update = save->no_current_update;
 
       /* restart primitive */
       CALL_End(GET_DISPATCH(), ());
-      vbo_save_NotifyBegin(ctx, curPrim, false);
+      vbo_save_NotifyBegin(ctx, curPrim, no_current_update);
    }
 }