tests: Add null checks in torture_config.c

Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

tests/unittests/torture_config.c

@@ -167,18 +167,21 @@ static void torture_config_from_file(void **state) {
 
     ret = ssh_options_get(session, SSH_OPTIONS_PROXYCOMMAND, &v);
     assert_true(ret == 0);
+    assert_non_null(v);
 
     assert_string_equal(v, PROXYCMD);
     ssh_string_free_char(v);
 
     ret = ssh_options_get(session, SSH_OPTIONS_IDENTITY, &v);
     assert_true(ret == 0);
+    assert_non_null(v);
 
     assert_string_equal(v, ID_FILE);
     ssh_string_free_char(v);
 
     ret = ssh_options_get(session, SSH_OPTIONS_USER, &v);
     assert_true(ret == 0);
+    assert_non_null(v);
 
     assert_string_equal(v, USERNAME);
     ssh_string_free_char(v);