Don't fail mysteriously on existing trace file.

[ccan] / ccan / list / list.c

diff --git a/ccan/list/list.c b/ccan/list/list.c
index 0a9e4e4d2d5d092ef1449b82c4a72781033fadc9..3d5811011bcc1e034dc1571a622162e8bbfeede6 100644 (file)
--- a/ccan/list/list.c
+++ b/ccan/list/list.c
@@ -2,9 +2,9 @@
 #include <stdlib.h>
 #include "list.h"
 
-struct list_head *list_check(struct list_head *h, const char *abortstr)
+struct list_head *list_check(const struct list_head *h, const char *abortstr)
 {
-       struct list_node *n, *p;
+       const struct list_node *n, *p;
        int count = 0;
 
        if (h->n.next == &h->n) {
@@ -15,7 +15,7 @@ struct list_head *list_check(struct list_head *h, const char *abortstr)
                                abortstr, h);
                        abort();
                }
-               return h;
+               return (struct list_head *)h;
        }
 
        for (p = &h->n, n = h->n.next; n != &h->n; p = n, n = n->next) {
@@ -29,5 +29,5 @@ struct list_head *list_check(struct list_head *h, const char *abortstr)
                        abort();
                }
        }
-       return h;
+       return (struct list_head *)h;
 }