Add a couple of compatibility hacks for GTK+-2.HEADmaster

In tree.c, if GTK_MAJOR_VERSION==2, I provide an implementation of GTK 3's
gtk_widget_get_preferred_size() for GTK 2.

In util.c, if GDK_WINDOWNING_X11 is defined, but GDK_IS_X11_DISPLAY()
isn't, I define it to always return 1.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/util.c b/src/util.c
index d63aeca..23ba3ab 100644
--- a/src/util.c
+++ b/src/util.c
@@ -45,6 +45,10 @@
 #define ZENITY_ERROR_DEFAULT	-1
 #define ZENITY_EXTRA_DEFAULT	127
 
+#if defined(GDK_WINDOWING_X11) && !defined(GDK_IS_X11_DISPLAY)
+#define GDK_IS_X11_DISPLAY(display) 1
+#endif
+
 GtkBuilder*
 zenity_util_load_ui_file (const gchar *root_widget, ...)
 {