assert(preview);
ADM_assert(preview);
void editorUpdatePreview(uint32_t framenum){//////	uint32_t fl,len;	 	assert(preview);  if( GUI_StillAlive())  {  		aprintf("Preview: Ask for frame %lu\n",framenum);		if(framenum<=preview->getInfo()->nb_frames-1)		{			preview->getFrameNumberNoAlloc(framenum,&len,unpackd,&fl);			GUI_PreviewUpdate(unpackd);		}  }//   virtual uint8_t getFrameNumberNoAlloc(uint32_t frame, uint32_t *len,//          																				uint8_t *data,uint32_t *flags)=0;}