tweak comment to indicate sub_pres_vlr fsm as dead code

sub_pres_vlr_fsm_start() only ever has an effect if ms_not_reachable_flag ==
true. But there simply is no code that sets this flag. So
sub_pres_vlr_fsm_start() is currently dead code.

Also, examining the FSM, if it should ever be set to true, this would halt the
LU/CM Service/Paging response, since the FSM would merely change its state
without dispatching asynchronous messages. No chance of finishing.

Short of dropping the code entirely, first just mark it. The point being that
this models some FSM definition from 3GPP specs, and we have a couple other
"if (0)" branches in the VLR...

Change-Id: I198d442e9ed288f37c7d4e5ec87b82dc53114e99
1 file changed