* Example:
* void _register_callback(void (*fn)(int, void *arg), void *arg);
* #define register_callback(fn, arg) \
- * _register_callback(typesafe_cb_preargs(void, (fn), void *, \
- * (arg), int), \
+ * _register_callback(typesafe_cb_preargs(void, void *, \
+ * (fn), (arg), int), \
* (arg))
*/
#define typesafe_cb_preargs(rtype, atype, fn, arg, ...) \