Fails to compile since glib 2.56

[jo-so]

% make
cc -fPIC -rdynamic -g -c -Wall -Wextra `pkg-config --cflags gobject-2.0` -DHAVE_LIBUNWIND gobject-list.c
In file included from /usr/include/glib-2.0/gobject/gbinding.h:29,
                 from /usr/include/glib-2.0/glib-object.h:23,
                 from gobject-list.c:25:
/usr/include/glib-2.0/gobject/gobject.h:512:34: error: expected identifier or ‘(’ before ‘__typeof__’
 #define g_object_ref(Obj)      ((__typeof__(Obj)) (g_object_ref) (Obj))
                                  ^~~~~~~~~~
gobject-list.c:405:1: note: in expansion of macro ‘g_object_ref’
 g_object_ref (gpointer object)
 ^~~~~~~~~~~~
/usr/include/glib-2.0/gobject/gobject.h:512:51: error: expected ‘)’ before ‘(’ token
 #define g_object_ref(Obj)      ((__typeof__(Obj)) (g_object_ref) (Obj))
                                                   ^
gobject-list.c:405:1: note: in expansion of macro ‘g_object_ref’
 g_object_ref (gpointer object)
 ^~~~~~~~~~~~
make: *** [Makefile:22: gobject-list.o] Fehler 1

from /usr/include/glib-2.0/gobject/gobject.h:

#if defined(g_has_typeof) && GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_56
/* Make reference APIs type safe with macros */
#define g_object_ref(Obj)      ((__typeof__(Obj)) (g_object_ref) (Obj))
#define g_object_ref_sink(Obj) ((__typeof__(Obj)) (g_object_ref_sink) (Obj))
#endif

[danni]

I haven't done much GObject development in recent years, I'd be happy to take a pull request.