Warning: call_user_func_array() expects parameter 1 to be a valid callback, class 'Mage_Wishlist_Helper_Data' does not have a method ''  in /home/windblox/public_html/windblox/app/code/core/Mage/Core/Model/Layout.php on line 324

#0 [internal function]: mageCoreErrorHandler(2, 'call_user_func_...', '/home/windblox/...', 324, Array)
#1 /home/windblox/public_html/windblox/app/code/core/Mage/Core/Model/Layout.php(324): call_user_func_array(Array, Array)
#2 /home/windblox/public_html/windblox/app/code/core/Mage/Core/Model/Layout.php(214): Mage_Core_Model_Layout->_generateAction(Object(Mage_Core_Model_Layout_Element), Object(Mage_Core_Model_Layout_Element))
#3 /home/windblox/public_html/windblox/app/code/core/Mage/Core/Model/Layout.php(210): Mage_Core_Model_Layout->generateBlocks(Object(Mage_Core_Model_Layout_Element))
#4 /home/windblox/public_html/windblox/app/code/core/Mage/Core/Model/Layout.php(210): Mage_Core_Model_Layout->generateBlocks(Object(Mage_Core_Model_Layout_Element))
#5 /home/windblox/public_html/windblox/app/code/core/Mage/Core/Controller/Varien/Action.php(344): Mage_Core_Model_Layout->generateBlocks()
#6 /home/windblox/public_html/windblox/app/code/core/Mage/Core/Controller/Varien/Action.php(269): Mage_Core_Controller_Varien_Action->generateLayoutBlocks()
#7 /home/windblox/public_html/windblox/app/code/community/My/Igallery/controllers/CategoryController.php(39): Mage_Core_Controller_Varien_Action->loadLayout()
#8 /home/windblox/public_html/windblox/app/code/core/Mage/Core/Controller/Varien/Action.php(418): My_Igallery_CategoryController->indexAction()
#9 /home/windblox/public_html/windblox/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('index')
#10 /home/windblox/public_html/windblox/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#11 /home/windblox/public_html/windblox/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#12 /home/windblox/public_html/windblox/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#13 /home/windblox/public_html/windblox/index.php(107): Mage::run('', 'store')
#14 {main}