[CRYPTO] authenc: Move initialisations up to shut up gcc

It seems that newer versions of gcc have regressed in their abilities to
analyse initialisations.  This patch moves the initialisations up to avoid
the warnings.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/authenc.c

@@ -84,8 +84,8 @@ static int crypto_authenc_hash(struct aead_request *req)
 		.tfm = auth,
 	};
 	u8 *hash = aead_request_ctx(req);
-	struct scatterlist *dst;
-	unsigned int cryptlen;
+	struct scatterlist *dst = req->dst;
+	unsigned int cryptlen = req->cryptlen;
 	int err;
 
 	hash = (u8 *)ALIGN((unsigned long)hash + crypto_hash_alignmask(auth), 
@@ -100,8 +100,6 @@ static int crypto_authenc_hash(struct aead_request *req)
 	if (err)
 		goto auth_unlock;
 
-	cryptlen = req->cryptlen;
-	dst = req->dst;
 	err = crypto_hash_update(&desc, dst, cryptlen);
 	if (err)
 		goto auth_unlock;
@@ -159,8 +157,8 @@ static int crypto_authenc_verify(struct aead_request *req)
 	};
 	u8 *ohash = aead_request_ctx(req);
 	u8 *ihash;
-	struct scatterlist *src;
-	unsigned int cryptlen;
+	struct scatterlist *src = req->src;
+	unsigned int cryptlen = req->cryptlen;
 	unsigned int authsize;
 	int err;
 
@@ -177,8 +175,6 @@ static int crypto_authenc_verify(struct aead_request *req)
 	if (err)
 		goto auth_unlock;
 
-	cryptlen = req->cryptlen;
-	src = req->src;
 	err = crypto_hash_update(&desc, src, cryptlen);
 	if (err)
 		goto auth_unlock;