xdgmime: Prevent infinite loops from badly-formed MIME registrations
xdgmime: Prevent infinite loops from badly-formed MIME registrations

Signed-off-by: Philip Withnall <withnall@endlessm.com>

Closes: #1875

endlessm/glib,endlessm/glib,endlessm/glib,endlessm/glib,endlessm/glib