fixed 2 possible heap overflows (inc. #1088)
void edts_del(GF_Box *s)
{
	GF_EditBox *ptr = (GF_EditBox *) s;
	gf_isom_box_del((GF_Box *)ptr->editList);
	gf_free(ptr);
}

void edts_del(GF_Box *s)
{
	GF_EditBox *ptr = (GF_EditBox *) s;
	gf_isom_box_del((GF_Box *)ptr->editList);
	gf_free(ptr);
}
