crypto: testmgr - Fix warning

crypto/testmgr.c: In function ‘test_cprng’:
crypto/testmgr.c:1204: warning: ‘err’ may be used uninitialized in this function
Signed-off-by: NFelipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

crypto/testmgr.c

@@ -1201,7 +1201,7 @@ static int test_cprng(struct crypto_rng *tfm, struct cprng_testvec *template,
 		      unsigned int tcount)
 {
 	const char *algo = crypto_tfm_alg_driver_name(crypto_rng_tfm(tfm));
-	int err, i, j, seedsize;
+	int err = 0, i, j, seedsize;
 	u8 *seed;
 	char result[32];