crypto/block-luks: fix memory leak in qcrypto_block_luks_create

Free block->cipher and block->ivgen on error path.
Signed-off-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: NAlberto Garcia <berto@igalia.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

crypto/block-luks.c

@@ -1341,6 +1341,9 @@ qcrypto_block_luks_create(QCryptoBlock *block,
     qcrypto_ivgen_free(ivgen);
     qcrypto_cipher_free(cipher);
 
+    qcrypto_cipher_free(block->cipher);
+    qcrypto_ivgen_free(block->ivgen);
+
     g_free(luks);
     return -1;
 }