Some minor optimizes to HDS fragment list generation.
Some minor optimizes to HDS fragment list generation.

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