WR_BINTERNAL
WR_BINTERNAL(dest, nksize ? nksize : bl->ksize,
WR_BINTERNAL(dest, 0, l->pgno, 0);
WR_BINTERNAL(dest, bl->ksize, r->pgno, 0);
WR_BINTERNAL(dest, nksize ? nksize : bl->ksize,
WR_BINTERNAL(dest, 0, l->pgno, 0);
WR_BINTERNAL(dest, bl->ksize, r->pgno, 0);