Avoid some deprecation warnings from GTK2 headers

samples/widgets/native.cpp

@@ -143,10 +143,12 @@ protected:
 
 #elif defined(__WXGTK__)
 
-// Avoid a bunch of warnings from gtk.h for some GTK+ 3 versions.
+// Avoid a bunch of warnings from gtk.h for some GTK+ versions.
+wxGCC_WARNING_SUPPRESS(deprecated-declarations)
 wxGCC_WARNING_SUPPRESS(parentheses)
 #include <gtk/gtk.h>
 wxGCC_WARNING_RESTORE(parentheses)
+wxGCC_WARNING_RESTORE(deprecated-declarations)
 
 class NativeWindow : public wxNativeWindow
 {

src/gtk/eggtrayicon.c

@@ -109,6 +109,7 @@ Anders
 
 #if wxUSE_TASKBARICON
 
+#define GLIB_DISABLE_DEPRECATION_WARNINGS
 #include <gtk/gtk.h>
 #if GTK_CHECK_VERSION(2, 1, 0)
 

src/gtk/treeentry_gtk.c

@@ -13,6 +13,11 @@ typedef pid_t GPid;
 #define GSEAL(x) x
 #endif
 
+#include "wx/setup.h"
+#ifndef __WXGTK3__
+    #define GLIB_DISABLE_DEPRECATION_WARNINGS
+#endif
+
 #include "wx/gtk/private/treeentry_gtk.h"
 
 /*