--- stack/stack.h	2002/02/17 04:03:57	1.2
+++ stack/stack.h	2002/03/07 01:21:07	1.3
@@ -46,6 +46,7 @@
    defined symbols */
 typedef struct {
   stackitem *gc_ref;
+  stackitem *gc_protect;
   int gc_limit, gc_count;
 
   stackitem *head;		/* Head of the stack */
@@ -114,3 +115,5 @@
 extern void readline(environment*);
 extern void sx_72656164(environment*);
 extern void foreach(environment*);
+void protect(environment*, value*);
+void unprotect(environment*);