VLR: vlr_subscr_{,msisdn_or_}name: const vsub arg

Make the vsub argument of both vlr_subscr_msisdn_or_name()
and vlr_subscr_name() a const.

The LOGVSUBP() macro uses vlr_subscr_name() and will not generate a
warning anymore when used with a const vsub.

Change-Id: If609269191f4df6186d823a2eee14012846328e2
2 files changed