After checking XLib sources, XGetWindowProperty does set data to NULL.

diff --git a/gdk/x11/gdkdnd-x11.c b/gdk/x11/gdkdnd-x11.c
index cca5cce85743a6de17de1e177289bb10f2e630c4..41598615b27030934f10f32f4efcf9e64e0620cb 100644 (file)
--- a/gdk/x11/gdkdnd-x11.c
+++ b/gdk/x11/gdkdnd-x11.c
@@ -2485,7 +2485,6 @@ xdnd_read_actions (GdkDragContext *context)
       
       gdk_error_trap_push ();
       
-      data = NULL;
       if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display),
                              GDK_DRAWABLE_XID (context->source_window),
                              gdk_x11_get_xatom_by_name_for_display (display, "XdndActionList"),