GetMaxSpawnProtectionTime, GetDisableTime,  GetKeyPressIgnoreTime fixes for hl2dm mp_teamplay = 0

In hl2dm GetClientTeam() returns 0 if team play is not enabled.   Added a case 0 for GetClientTeam() in GetMaxSpawnProtectionTime(), GetDisableTime(),  GetKeyPressIgnoreTime() to have time value use default cvar settings, otherwise these timers would not function correctly.