PHP Warning: imagedestroy() expects parameter 1 to be resource - Joomla 1.5: Общие вопросы

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PHP Warning:  imagedestroy() expects parameter 1 to be resource, null given in /home/ukr508447/domains/мой сайт/public_html/plugins/content/joomslide.php on line 379

<?php
// no direct access
defined( '_JEXEC' ) or die( 'Restricted access' );

jimport( 'joomla.plugin.plugin' );

/**
 * redirection vers com_error404 plugin
 */
class plgSystemError404 extends JPlugin
{
	/**
	 * Constructor
	 *
	 * For php4 compatibility we must not use the __constructor as a constructor for plugins
	 * because func_get_args ( void ) returns a copy of all passed arguments NOT references.
	 * This causes problems with cross-referencing necessary for the observer design pattern.
	 *
	 * @access	protected
	 * @param	object	$subject The object to observe
	 * @param 	array   $config  An array that holds the plugin configuration
	 * @since	1.0
	 */
	/*function plgError404Stat( &$subject, $config )
	{
		parent::__construct( $subject, $config );

		// Do some extra initialisation in this constructor if required
	}*/

	/**
	 * Do something onAfterInitialise 
	 */
	function onAfterRoute()
	{
		global $mainframe;
		
		// No need in admin panel
	    if( $mainframe->isAdmin() ) return;
					
		$option=JREQUEST::getVar("option",null,"REQUEST");
		$view=JREQUEST::getVar("view",null,"REQUEST");
		$Itemid=JREQUEST::getVar("Itemid",null,"REQUEST");
		$task=JREQUEST::getVar("task",null,"REQUEST");
		$id=JREQUEST::getVar("id",null,"GET");
		$do=JREQUEST::getVar("do",null,"REQUEST");
		$layout=JREQUEST::getVar("layout",null,"REQUEST");
		//$func_kunena=JREQUEST::getVar("func",null,"GET");
		$route=&JRouter::getInstance("site");	
		$uri=& JURI::getInstance();
		$path=$uri->_path;			
		$mode=$route->_mode;
		$count="";
                
		//var_dump($option);var_dump($view);var_dump($id);var_dump($func_kunena);var_dump(JREQUEST::get());
		
		// We verify in database that article exists
		if ($option=="com_content" && $view=="article" && $id!="")
		{
		$id=explode(':',$id,2);
		$id=$id[0];
		$db =& JFactory::getDBO();
 		$query = "SELECT COUNT(*) FROM #__content WHERE id = $id and (state=1 or state='-1')";
		$db->setQuery($query);
		$count = $db->loadResult();
                }
		
		if ($option=="com_kunena" && $do!="") {return;}
		if (($option=="com_content") && $view=="frontpage" && $Itemid==1 && !isset($_SERVER['REDIRECT_URL']) && $mode=="1") {return;}
	    if (($option=="com_content") && $view=="frontpage" && $Itemid==1 && $_SERVER['SCRIPT_FILENAME']==JPATH_BASE."/index.php" && $mode=="0" && !isset($_SERVER['REDIRECT_URL'])) {return;}
	   	if (($option=="com_content") && $view=="article" && $layout=="form") {return;}
		//if (($option=="com_content") && $view=="archive") {return;}
		if ($article=="view" && $task=="edit") {return;}
		if ($task=="save"){return;}