[glib/glib-2-54] gtype: Fix use of potentially undefined GVoidFunc

[Philip Withnall <pwithnall src gnome org>]

commit cb451011c3b2f584f2bb51fe2deb0abc073b59b8
Author: Philip Withnall <withnall endlessm com>
Date:   Fri Feb 16 17:42:55 2018 +0000

    gtype: Fix use of potentially undefined GVoidFunc
    
    It’s defined in gutils.h, but various users of GLib might not have
    access to that.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>
    Reviewed-by: nobody
    
    https://bugzilla.gnome.org/show_bug.cgi?id=793272

 gobject/gtype.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gobject/gtype.h b/gobject/gtype.h
index af1496c71..d55aef972 100644
--- a/gobject/gtype.h
+++ b/gobject/gtype.h
@@ -2008,7 +2008,7 @@ type_name##_get_type (void) \
         g_type_register_static_simple (G_TYPE_INTERFACE, \
                                        g_intern_static_string (#TypeName), \
                                        sizeof (TypeName##Interface), \
-                                       (GClassInitFunc)(GVoidFunc)type_name##_default_init, \
+                                       (GClassInitFunc)(void (*)(void)) type_name##_default_init, \
                                        0, \
                                        (GInstanceInitFunc)NULL, \
                                        (GTypeFlags) 0); \