freak_fortress_2: Fix unlocking capture point is not working

[M60TM]

In detail:

• tf_logic_arena's CapEnableDelay is only used for setting tf_gamerules_data's m_flCapturePointEnableTime before arena round start.
• So, unlocking by alive check(ff2_game_capture_alive) actually unlock them if ff2_game_capture_time ConVar value was not setup(ex. 0.0)
• But if ff2_game_capture_time ConVar has positive value, even if the number of people is appropriate, it will not be opened until the time is right.

void CTFGameRules::SetupOnStalemateStart( void )
{
...
        CArenaLogic *pArenaLogic = dynamic_cast< CArenaLogic * > (gEntList.FindEntityByClassname( NULL, "tf_logic_arena" ) );

        if ( pArenaLogic )
        {
            pArenaLogic->m_OnArenaRoundStart.FireOutput( pArenaLogic, pArenaLogic );

            if ( tf_arena_override_cap_enable_time.GetFloat() > 0 )
            {
                m_flCapturePointEnableTime = gpGlobals->curtime + tf_arena_override_cap_enable_time.GetFloat();
            }
            else
            {
                m_flCapturePointEnableTime = gpGlobals->curtime + pArenaLogic->m_flTimeToEnableCapPoint;
            }

            IGameEvent *event = gameeventmanager->CreateEvent( "arena_round_start" );
            if ( event )
            {
                gameeventmanager->FireEvent( event );
            }

            BroadcastSound( 255, "Announcer.AM_RoundStartRandom" );
        }
...
}