misc/balloc.h: allow allocating zero bytes. Probably fixes code which assumed this can be done.
misc/balloc.h: allow allocating zero bytes. Probably fixes code which assumed this can be done.


DavidCox1979/badvpn,DavidCox1979/badvpn,DavidCox1979/badvpn,DavidCox1979/badvpn,DavidCox1979/badvpn