From b79cc545ec020f7dd4bd83dcd06af3cf2b1fcaff Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Tue, 28 Aug 2012 05:20:20 -0400
Subject: [PATCH] Improvements/fixes for Larry skin

---
 program/include/rcube_db.php |   16 +++++++++++++---
 1 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/program/include/rcube_db.php b/program/include/rcube_db.php
index 33dcbe9..f97d70a 100644
--- a/program/include/rcube_db.php
+++ b/program/include/rcube_db.php
@@ -266,11 +266,17 @@
     /**
      * Getter for error state
      *
-     * @return boolean True on error
+     * @param int $res_id Optional query result identifier
+     *
+     * @return string Error message
      */
-    public function is_error()
+    public function is_error($res_id = null)
     {
-        return $this->db_error ? $this->db_error_msg : false;
+        if ($res_id !== null) {
+            return $this->_get_result($res_id) === false ? $this->db_error_msg : null;
+        }
+
+        return $this->db_error ? $this->db_error_msg : null;
     }
 
     /**
@@ -570,6 +576,10 @@
             return intval($input);
         }
 
+        if (is_null($input)) {
+            return 'NULL';
+        }
+
         // create DB handle if not available
         if (!$this->dbh) {
             $this->db_connect('r');

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