A little fix to make sure that only GdkWindow really has access to these props.
A little fix to make sure that only GdkWindow really has access to these props.


php/php-gtk-src,marcosptf/php-gtk-src,php/php-gtk-src,php/php-gtk-src,marcosptf/php-gtk-src,marcosptf/php-gtk-src,marcosptf/php-gtk-src,marcosptf/php-gtk-src,php/php-gtk-src,marcosptf/php-gtk-src,php/php-gtk-src,php/php-gtk-src