gdbm: code cleanup
gdbm: code cleanup

mcandre/factor,erg/factor,erg/factor,erg/factor,erg/factor,mcandre/factor,kingcons/factor,mcandre/factor,mcandre/factor,mcandre/factor,kingcons/factor,erg/factor,kingcons/factor,erg/factor,erg/factor,mcandre/factor,kingcons/factor,mcandre/factor