crypto: In crypto_add_alg(), 'exact' wants to be initialized to 0

We declare 'exact' without initializing it and then do:

[...]
	if (strlen(p->cru_driver_name))
		exact = 1;

	if (priority && !exact)
		return -EINVAL;

[...]

If the first 'if' is not true, then the second will test an
uninitialized 'exact'.
As far as I can tell, what we want is for 'exact' to be initialized to
0 (zero/false).
Signed-off-by: NJesper Juhl <jj@chaosbits.net>
Acked-by: NSteffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

crypto/crypto_user.c

@@ -304,7 +304,7 @@ static int crypto_del_alg(struct sk_buff *skb, struct nlmsghdr *nlh,
 static int crypto_add_alg(struct sk_buff *skb, struct nlmsghdr *nlh,
 			  struct nlattr **attrs)
 {
-	int exact;
+	int exact = 0;
 	const char *name;
 	struct crypto_alg *alg;
 	struct crypto_user_alg *p = nlmsg_data(nlh);