alloc: avoid arithmetic on void pointers.

diff --git a/ccan/alloc/alloc.c b/ccan/alloc/alloc.c
index e9aaf3ddea8c7c7727f6a65c5ccd4a516209307c..4b3c03cea47c3ea1910460105b9939fcb545d00e 100644 (file)
--- a/ccan/alloc/alloc.c
+++ b/ccan/alloc/alloc.c
@@ -422,7 +422,8 @@ static void del_large_from_small_free_list(struct header *head,
 
        for (i = 0; i < SMALL_PAGES_PER_LARGE_PAGE; i++) {
                del_from_list(head, &head->small_free_list,
-                             (void *)ph + (i << sp_bits),
+                             (struct page_header *)((char *)ph 
+                                                    + (i << sp_bits)),
                              sp_bits);
        }
 }