7.3.: Another signature warning

When enabling or disabling a module in the module manager, if you have show errors and E_WARNING enabled you get this in the javascript console:

Warning: Declaration of Vtiger_LayoutExport::__initExport($layoutName) should be compatible with Vtiger_PackageExport::__initExport($module, $moduleInstance) in /var/www/html/vt730/vtlib/Vtiger/LayoutExport.php on line 0

And the showProgress overlay never gets hidden again.