Corrected strange behavior with non-ISO images on overwriteable media

libisoburn/isoburn.c

@@ -121,7 +121,7 @@ int isoburn_new(struct isoburn **objpt, int flag)
  o->fabricated_disc_status= BURN_DISC_UNREADY;
  o->toc= NULL;
  o->wrote_well= -1;
- for(i=0;i<65536;i++)
+ for(i=0;i<Libisoburn_target_head_sizE;i++)
    o->target_iso_head[i]= 0;
  o->image= NULL;
  o->read_pacifier= NULL;