Revert "libiptc: fix wrong maptype of base chain counters on restore"

Revert "libiptc: fix wrong maptype of base chain counters on restore"

This reverts commit 7c4d668c9c2ee007c82063b7fc784cbbf46b2ec4.

The change can't be right: A simple rule append call will reset all
built-in chains' counters. The old code works fine even given the
mentioned "empty restore" use-case, at least if counters don't change on
the fly in-kernel.

Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=912
Fixes: 7c4d668c9c2ee ("libiptc: fix wrong maptype of base chain counters on restore")
Signed-off-by: Phil Sutter <phil@nwl.cc>