// the zero value is a crash.  To bridge the gap, the
// init bool says whether this is a valid gmp value.
// doinit initializes z.i if it needs it.  This is not inherent
// to FFI, just a mismatch between Go's convention of
// making zero values useful and gmp's decision not to.
func (z *Int) doinit() {
	if z.init {
		return
	}
	z.init = true
	C.mpz_init(&z.i[0])
}

FB02          ; mapped                 ; 0066 006C     # 1.1  LATIN SMALL LIGATURE FL
FB03          ; mapped                 ; 0066 0066 0069 #1.1  LATIN SMALL LIGATURE FFI
FB04          ; mapped                 ; 0066 0066 006C #1.1  LATIN SMALL LIGATURE FFL
FB05..FB06    ; mapped                 ; 0073 0074     # 1.1  LATIN SMALL LIGATURE LONG S T..LATIN SMALL LIGATURE ST