oops: fix oidc_parse_expires_in broken in previous commit

Signed-off-by: Hans Zandbelt <hans.zandbelt@openidc.com>

src/mod_auth_openidc.c

@@ -2144,11 +2144,10 @@ static apr_byte_t oidc_save_in_session(request_rec *r, oidc_cfg *c,
  * parse the expiry for the access token
  */
 static int oidc_parse_expires_in(request_rec *r, const char *expires_in) {
-	if (expires_in != NULL)
-		return -1;
 	int number = _oidc_str_to_int(expires_in);
 	if (number <= 0)
-		oidc_warn(r, "could not convert \"expires_in\" value (%s) to a number",
+		oidc_warn(r,
+				"could not parse \"expires_in\" value (%s) into a positive integer",
 				expires_in);
 	return number;
 }