Actually mark void arg lists as void.
@@ -502,8 +502,8 @@ int vareq(void *a, void *b);
Op exprop(Node *n);
/* specialize generics */
-Tysubst *mksubst();
-void substfree();
+Tysubst *mksubst(void);
+void substfree(Tysubst *subst);
void substput(Tysubst *subst, Type *from, Type *to);
Type *substget(Tysubst *subst, Type *from);
void substpush(Tysubst *subst);
