Fixes #3426, make sure idSite in Piwik menu is always numeric.

git-svn-id: http://dev.piwik.org/svn/trunk@7631 59fd770c-687e-43c8-a1e3-f5a4ff64c105

core/Menu/Abstract.php

@@ -55,6 +55,12 @@ abstract class Piwik_Menu_Abstract
 	{
 		if($displayedForCurrentUser)
 		{
+			// make sure the idSite value used is numeric (hack-y fix for #3426)
+			if (!is_numeric(Piwik_Common::getRequestVar('idSite', false)))
+			{
+				$url['idSite'] = reset(Piwik_SitesManager_API::getInstance()->getSitesIdWithAtLeastViewAccess());
+			}
+			
 			$this->menuEntries[] = array(
 				$menuName,
 				$subMenuName,