Fix flaky openssl_pkey_new test

Public key size may vary by one bit... switch to using %d for
key sizes.

Author: nikic

ext/openssl/tests/openssl_pkey_new_basic.phpt

@@ -86,10 +86,10 @@ $details = openssl_pkey_get_details($dh);
 $dh_details = $details['dh'];
 openssl_pkey_test_cmp($phex, $dh_details['p']);
 var_dump($dh_details['g']);
-var_dump(strlen($dh_details['pub_key']) > 0);
-var_dump(strlen($dh_details['priv_key']) > 0);
+var_dump(strlen($dh_details['pub_key']));
+var_dump(strlen($dh_details['priv_key']));
 ?>
---EXPECT--
+--EXPECTF--
 int(0)
 int(0)
 int(0)
@@ -98,9 +98,9 @@ int(0)
 int(0)
 int(0)
 int(0)
-int(20)
-int(128)
+int(%d)
+int(%d)
 int(0)
 string(1) "2"
-bool(true)
-bool(true)
+int(%d)
+int(%d)