Fix: libcrmcommon: Don't require version info when applying CIB patches

This fixes a regression introduced by 9cd1ccbb, which broke updates by
pcs. pcs generates a CIB diff after editing the CIB XML directly, rather
than using Pacemaker tools that automatically bump the CIB version.

This regression has not made it into any release.

Signed-off-by: Reid Wahl <nrwahl@protonmail.com>