fixed unresolved references with GTK+ 2.0

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29277 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/unix/taskbarx11.cpp b/src/unix/taskbarx11.cpp
index cf64c408a6715b52cd1967a3150f6b4582c509a8..cf94b215837d56a4b98e12ccc9658a1300b8301a 100644 (file)
--- a/src/unix/taskbarx11.cpp
+++ b/src/unix/taskbarx11.cpp
@@ -48,8 +48,14 @@
 // ----------------------------------------------------------------------------
 
 #ifdef __WXGTK20__
-    #include "wx/gtk/taskbarpriv.h"
-#else
+    #include <gtk/gtk.h>
+    #if GTK_CHECK_VERSION(2,1,0)
+        #include "wx/gtk/taskbarpriv.h"
+        #define TASKBAR_ICON_AREA_BASE_INCLUDED
+    #endif
+#endif
+
+#ifndef TASKBAR_ICON_AREA_BASE_INCLUDED
     class WXDLLIMPEXP_ADV wxTaskBarIconAreaBase : public wxFrame
     {
     public: