ccan/tally: don't use SIZE_MAX.

Michael Adam points out this broke the build farm (ie. OSF1 axp V5.1 2650 alpha)
so fixed in CCAN and imported from af7a902d74a7926693f55da9e21a67dde46931d4:

    Turns out it's not standard (thanks Samba build farm!)
    And the previous test had a hole in it anyway.  This one is more conservative.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Autobuild-User: Rusty Russell <rusty@rustcorp.com.au>
Autobuild-Date: Wed Jul  6 08:34:05 CEST 2011 on sn-devel-104

diff --git a/lib/ccan/tally/tally.c b/lib/ccan/tally/tally.c
index b1839befe3b4016287ded6203767be305e65b657..396474b250e0c04be0b8a581a2fddc1bb553c7a4 100644 (file)
--- a/lib/ccan/tally/tally.c
+++ b/lib/ccan/tally/tally.c
@@ -27,8 +27,8 @@ struct tally *tally_new(unsigned buckets)
        if (buckets == 0)
                buckets = 1;
 
-       /* Check for overflow. */
-       if (buckets && SIZE_MAX / buckets < sizeof(tally->counts[0]))
+       /* Overly cautious check for overflow. */
+       if (sizeof(*tally) * buckets / sizeof(*tally) != buckets)
                return NULL;
        tally = malloc(sizeof(*tally) + sizeof(tally->counts[0])*(buckets-1));
        if (tally) {