crypto/nettle: Fix xts_encrypt arguments

The fourth argument to xts_encrypt should be the decrypt
callback; we were accidentally passing encrypt twice.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

crypto/cipher-nettle.c.inc

@@ -632,7 +632,7 @@ qcrypto_nettle_cipher_encrypt(QCryptoCipher *cipher,
     case QCRYPTO_CIPHER_MODE_XTS:
 #ifdef CONFIG_QEMU_PRIVATE_XTS
         xts_encrypt(ctx->ctx, ctx->ctx_tweak,
-                    ctx->alg_encrypt_wrapper, ctx->alg_encrypt_wrapper,
+                    ctx->alg_encrypt_wrapper, ctx->alg_decrypt_wrapper,
                     ctx->iv, len, out, in);
 #else
         xts_encrypt_message(ctx->ctx, ctx->ctx_tweak,