fixed error when no group
fixed error when no group

olegshilov/jsOnlyLightbox,mohan43u/jsOnlyLightbox,felixhagspiel/jsOnlyLightbox,felixhagspiel/jsOnlyLightbox,olegshilov/jsOnlyLightbox,mohan43u/jsOnlyLightbox,actorapp/jsOnlyLightbox,actorapp/jsOnlyLightbox