gc: don't mark COBJ cls_sym.

* gc.c (mark_obj): We don't need to mark this because it's
necessarily a protected symbol handled by prot_sym.
Waste of cycles.

1 files changed, 1 insertions, 1 deletions

diff --git a/gc.c b/gc.c
index 446060ec..adaf526e 100644
--- a/gc.c
+++ b/gc.c
@@ -429,7 +429,7 @@ tail_call:
     mark_obj_tail(obj->ls.list);
   case COBJ:
     obj->co.ops->mark(obj);
-    mark_obj_tail(obj->co.cls->cls_sym);
+    return;
   case CPTR:
     obj->co.ops->mark(obj);
     mark_obj_tail(obj->cp.cls);