Minor polish to the malloc allocator:
Minor polish to the malloc allocator:

Ensure that stats are correct if allocations fail.

Don't rely on the VSC counter for checking the limit.

wikimedia/operations-debs-varnish,ssm/pkg-varnish,wikimedia/operations-debs-varnish,wikimedia/operations-debs-varnish,ssm/pkg-varnish,ssm/pkg-varnish,wikimedia/operations-debs-varnish,wikimedia/operations-debs-varnish,ssm/pkg-varnish,ssm/pkg-varnish