Notice: Undefined index: referrer  in /chroot/home/cocobopc/cocobop.com/html/app/code/local/Vonnda/Stylepoint/controllers/IndexController.php on line 13

#0 /chroot/home/cocobopc/cocobop.com/html/app/code/local/Vonnda/Stylepoint/controllers/IndexController.php(13): mageCoreErrorHandler(8, 'Undefined index...', '/chroot/home/co...', 13, Array)
#1 /chroot/home/cocobopc/cocobop.com/html/app/code/core/Mage/Core/Controller/Varien/Action.php(420): Vonnda_Stylepoint_IndexController->shareProductAction()
#2 /chroot/home/cocobopc/cocobop.com/html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('shareProduct')
#3 /chroot/home/cocobopc/cocobop.com/html/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#4 /chroot/home/cocobopc/cocobop.com/html/app/code/core/Mage/Core/Model/App.php(349): Mage_Core_Controller_Varien_Front->dispatch()
#5 /chroot/home/cocobopc/cocobop.com/html/app/Mage.php(640): Mage_Core_Model_App->run(Array)
#6 /chroot/home/cocobopc/cocobop.com/html/index.php(80): Mage::run('', 'store')
#7 {main}