Also mark some arguments to __virRaiseError.
* Makefile.maint (msg_gen_function): Add error.
* po/POTFILES.in: Add src/openvz_conf.c and src/openvz_driver.c.
* src/openvz_conf.c (openvzParseXML, openvzGetVPSInfo): Mark strings.
* src/openvz_driver.c (openvzDomainLookupByID): Likewise.
(openvzDomainLookupByUUID, openvzDomainLookupByName): Likewise.
(openvzDomainGetInfo, openvzDomainShutdown, openvzDomainReboot)
(openvzDomainCreate, openvzDomainUndefine): Likewise.
* src/remote_internal.c (check_cert_file): Likewise.
(negotiate_gnutls_on_connection, verify_certificate): Likewise.
(remoteAuthenticate, addrToString, remoteAuthSASL): Likewise.
(remoteAuthPolkit, call, really_read_buf): Likewise.