using the email_address_preference for notifications

@@ -248,7 +248,20 @@ function send_email($uid = 0, $contents,$args, $override = false) {
         $to_email = $args['email'];
     } else {
         $user               = new WP_User($uid);
-        $to_email           = $user->user_email;
+        
+        $email_address_preference = get_user_meta($user->ID, 'email_address_preference', true);
+        if (empty($email_address_preference)) {
+            $to_email = $user->user_email;
+        } else {
+            
+            $pp = strtolower($email_address_preference)."_";
+            $to_email = get_user_meta($user->ID, $pp.'email', true);
+            
+            if (empty($to_email)) {
+                $to_email = $user->user_email;
+            }   
+        }
+        
     }
     
     $from_address       = get_bloginfo('admin_email');