Alessandro Bono authored Jan 16, 2023 and Marge Bot committed Jan 17, 2023

According to the org.freedesktop.impl.portal.Access documentation
the body may be an empty string[1]. Take into account this case.

[1] https://github.com/flatpak/xdg-desktop-portal/blob/d7cfc16a6dc11cb925116fe36c5ee23e7075849c/data/org.freedesktop.impl.portal.Access.xml#L38

Part-of: <GNOME/gnome-shell!2607>