fix strict standards error

Author: wojsmol

backbutton.php

@@ -37,7 +37,7 @@ function plgContentBackbutton( &$subject, $params )
 
 	function onContentPrepare( $context, &$article, &$params, $page=0 )
 	{
-		$app = &JFactory::getApplication();
+		$app = JFactory::getApplication();
 		$this->params->get('showindiv') == 1 ? $link = '<div class="backbutton">' : $link = '';
 		$this->params->get('linkclass') == 1 ? $aclass = 'class="backbutton"' : $aclass = '';
 		$pattern = '{backbutton}';

backbutton.xml

@@ -8,7 +8,7 @@
   <creationDate>May 2015</creationDate>
   <copyright>Copyright Zwart Schaap webdesign 2008 and Wojciech Smoliński 2011</copyright>
   <license>GNU/GPL</license>
-  <version>1.2.2</version>
+  <version>1.2.3</version>
   <description>BB_DESCRIPTION</description>
   <files>
     <filename plugin="backbutton">backbutton.php</filename>