crypto: lrw - fix memleak

LRW module leaks child cipher memory when init_tfm() fails because of child
block size not being 16.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/lrw.c

@@ -220,6 +220,7 @@ static int init_tfm(struct crypto_tfm *tfm)
 
 	if (crypto_cipher_blocksize(cipher) != 16) {
 		*flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN;
+		crypto_free_cipher(cipher);
 		return -EINVAL;
 	}