Prevent crash when calling getTime() on an empty DTSC::Stream
Prevent crash when calling getTime() on an empty DTSC::Stream

rbouqueau/libdtsc_xp,DDVTECH/mistserver,DDVTECH/mistserver,rbouqueau/libdtsc_xp,rbouqueau/libdtsc_xp,DDVTECH/mistserver,DDVTECH/mistserver,DDVTECH/mistserver