ALIGNMORE
(((x)->size <= ALIGNMORE((x)->block)) ? 0 : \
(x)->size - ALIGNMORE((x)->block))))
if (a->size <= ALIGNMORE(a->block->data))
size = nbytes + ALIGNMORE(a->block->data);
x->size = ALIGNMORE(a->block->data);
retblock = a->block->data + ALIGNMORE(a->block->data);