[opw-web] Clarify error when refresh token is missing

[Owen Taylor <otaylor src gnome org>]

commit f6d3abe27a2fc49261047c267989c5df51600309
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Tue Dec 29 12:05:45 2015 -0500

    Clarify error when refresh token is missing

 auth/Hybrid/Provider_Model_OAuth2.php |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/auth/Hybrid/Provider_Model_OAuth2.php b/auth/Hybrid/Provider_Model_OAuth2.php
index 934b1aa..aaae805 100644
--- a/auth/Hybrid/Provider_Model_OAuth2.php
+++ b/auth/Hybrid/Provider_Model_OAuth2.php
@@ -138,10 +138,12 @@ class Hybrid_Provider_Model_OAuth2 extends Hybrid_Provider_Model
                if( $this->api->access_token ){
 
                        // have to refresh?
-                       if( $this->api->refresh_token && $this->api->access_token_expires_at ){
-
+                       if( $this->api->access_token_expires_at ) {
                                // expired?
-                               if( $this->api->access_token_expires_at <= time() ){ 
+                               if( $this->api->access_token_expires_at <= time() ){
+                                       if( ! $this->api->refresh_token )
+                                               throw new Exception( "Expired access token but no refresh 
token" );
+
                                        $response = $this->api->refreshToken( array( "refresh_token" => 
$this->api->refresh_token ) );
 
                                        if( ! isset( $response->access_token ) || ! $response->access_token ){