[CRYPTO] tcrypt: Add missing error check

The return value of crypto_hash_final isn't checked in test_hash_cycles.
This patch corrects this.  Thanks to Eric Sesterhenn for reporting this.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index f0aed01..11f9359 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -691,7 +691,7 @@
 			if (ret)
 				goto out;
 		}
-		crypto_hash_final(desc, out);
+		ret = crypto_hash_final(desc, out);
 		if (ret)
 			goto out;
 	}