From 75cd8d2c39437c935f833632b00e3f7ff9c6442b Mon Sep 17 00:00:00 2001
From: Ralf Becker <ralfbecker@outdoor-training.de>
Date: Fri, 22 Aug 2014 12:27:31 +0000
Subject: [PATCH] Fix unable to have checkboxes with an unselected value that
 evaluates to false.

---
 .../class.etemplate_widget_checkbox.inc.php   | 21 +++++++++++--------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/etemplate/inc/class.etemplate_widget_checkbox.inc.php b/etemplate/inc/class.etemplate_widget_checkbox.inc.php
index 2f3216f6a3..919130a9e2 100644
--- a/etemplate/inc/class.etemplate_widget_checkbox.inc.php
+++ b/etemplate/inc/class.etemplate_widget_checkbox.inc.php
@@ -61,16 +61,19 @@ class etemplate_widget_checkbox extends etemplate_widget
 			$type = $this->type ? $this->type : $this->attrs['type'];
 			$value_attr = $type == 'radio' ? 'set_value' : 'selected_value';
 			// defaults for set and unset values
-			if (!$this->attrs[$value_attr] && !$this->attrs['unselected_value'])
+			$selected_value = true;
+			$unselected_value = false;
+			if (array_key_exists($value_attr, $this->attrs) || array_key_exists('unselected_value',$this->attrs))
 			{
-				$selected_value = true;
-				$unselected_value = false;
-			}
-			else
-			{
-				// Expand any content stuff
-				$selected_value = self::expand_name($this->attrs[$value_attr], $expand['c'], $expand['row'], $expand['c_'], $expand['row_'],$expand['cont']);
-				$unselected_value = self::expand_name($this->attrs['unselected_value'], $expand['c'], $expand['row'], $expand['c_'], $expand['row_'],$expand['cont']);
+				if(array_key_exists($value_attr, $this->attrs))
+				{
+					// Expand any content stuff
+					$selected_value = self::expand_name($this->attrs[$value_attr], $expand['c'], $expand['row'], $expand['c_'], $expand['row_'],$expand['cont']);
+				}
+				if(array_key_exists('unselected_value',$this->attrs))
+				{
+					$unselected_value = self::expand_name($this->attrs['unselected_value'], $expand['c'], $expand['row'], $expand['c_'], $expand['row_'],$expand['cont']);
+				}
 			}
 			if ($type == 'radio')
 			{