Fix bug #262: Listview Back Button doesn't work.

Simple commit to fix the Back Button not working in 6.5.0

modules/Vtiger/models/Paging.php

@@ -122,6 +122,9 @@ class Vtiger_Paging_Model extends Vtiger_Base_Model {
$rangeInfo = array();
$recordCount = count($recordList);
$pageLimit = $this->getPageLimit();
+
+		$this->set('prevPageExists', true);
+
if( $recordCount > 0) {
//specifies what sequencce number of last record in prev page
$prevPageLastRecordSequence = (($this->getCurrentPage()-1)*$pageLimit);
@@ -149,4 +152,4 @@ class Vtiger_Paging_Model extends Vtiger_Base_Model {
return $this;
}
-}
\ No newline at end of file
+}