Fix for mini-gmp mpz_clrbit.

ChangeLog

+2014-08-26  Niels Möller  <nisse@lysator.liu.se>
+
+	* mini-gmp.c (mpz_abs_sub_bit): Do full normalization, needed in
+	case the most significant bit is cleared.
+
 2014-08-25  Niels Möller  <nisse@lysator.liu.se>
 
 	* testsuite/ecdh-test.c (set_point): Check return value of

mini-gmp.c

@@ -3569,7 +3569,7 @@ mpz_abs_sub_bit (mpz_t d, mp_bitcnt_t bit_index)
 
   gmp_assert_nocarry (mpn_sub_1 (dp + limb_index, dp + limb_index,
 				 dn - limb_index, bit));
-  dn -= (dp[dn-1] == 0);
+  dn = mpn_normalized_size (dp, dn);
   d->_mp_size = (d->_mp_size < 0) ? - dn : dn;
 }