* malloc/memusage.c: Handle realloc with new size of zero and

* malloc/memusage.c: Handle realloc with new size of zero and

	non-NULL pointer correctly.
	(me): Really write first record twice.
	(struct entry): Make format bi-arch safe.
	(dest): Write out more realloc statistics.
	* malloc/memusagestat.c (struct entry): Make format bi-arch safe.