libmsc/msc_vty.c: drop dead comparison against null

Since vsub->sgs.mme_name is allocated statically, comparing it
to null doesn't make sense - it's always != NULL.

Change-Id: Ib2933a20471ebff9dfe1d9fdddf39d177504c951
Fixes: CID#178166 Array compared against 0 (NO_EFFECT)
1 file changed