gdk: fix transfer type in Drop::read_async
the mimetype out param is transfer none
@@ -38,7 +38,7 @@ impl Drop {
&mut error,
);
let result = if error.is_null() {
- Ok((from_glib_full(ret), from_glib_full(out_mime_type)))
+ Ok((from_glib_full(ret), from_glib_none(out_mime_type)))
} else {
Err(from_glib_full(error))
};
