Fix segfault on 32 bit machines
Fix segfault on 32 bit machines

Adjust the size of the rec field to match what's in shmlog.

No corresponding -trunk commit as the code has been reworked already.

Fixes #765


git-svn-id: 98fbe89a0680fab18aa24ea26423615aa8f1c98e@5150 d4fa192b-c00b-0410-8231-f00ffab90ce4

wikimedia/operations-debs-varnish,wikimedia/operations-debs-varnish,ssm/pkg-varnish,ssm/pkg-varnish,ssm/pkg-varnish,wikimedia/operations-debs-varnish,CartoDB/Varnish-Cache,wikimedia/operations-debs-varnish,wikimedia/operations-debs-varnish,CartoDB/Varnish-Cache,CartoDB/Varnish-Cache,ssm/pkg-varnish,ssm/pkg-varnish