revoke OpenVMS dependend part of r67326

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67433 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/treeentry_gtk.c

@@ -9,6 +9,9 @@
 
 #ifdef __VMS
 #include <types.h>
+typedef pid_t GPid;
+#define G_GNUC_INTERNAL 
+#define GSEAL(x) x
 #endif
 
 #include "wx/gtk/treeentry_gtk.h"