(nettle_mpz_get_str_256): Declare the input argument

const.

Rev: src/nettle/bignum.c:1.3
Rev: src/nettle/bignum.h:1.2

bignum.c

@@ -35,7 +35,7 @@
 #include <string.h>
 
 void
-nettle_mpz_get_str_256(unsigned length, uint8_t *s, mpz_t x)
+nettle_mpz_get_str_256(unsigned length, uint8_t *s, const mpz_t x)
 {
   uint8_t *dst = s + length - 1;
   unsigned size = mpz_size(x);

bignum.h

@@ -32,7 +32,7 @@
 /* Writes an unsigned integer as length octets, using big endian byte
  * order. */
 void
-nettle_mpz_get_str_256(unsigned length, uint8_t *s, mpz_t x);
+nettle_mpz_get_str_256(unsigned length, uint8_t *s, const mpz_t x);
 
 void
 nettle_mpz_set_str_256(mpz_t x,