[dia] win32: more fixes

[Zander <zbrown src gnome org>]

commit 6eef78c9df183fe156c6b7bdfe472e02e697eeb6
Author: Zander Brown <zbrown gnome org>
Date:   Sat Apr 25 17:07:23 2020 +0100

    win32: more fixes

 lib/libdia.def | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/lib/libdia.def b/lib/libdia.def
index 86f91c91..5cb8d74e 100644
--- a/lib/libdia.def
+++ b/lib/libdia.def
@@ -178,6 +178,7 @@ EXPORTS
  data_render_paginated
  data_select
  data_set_active_layer
+ dia_diagram_data_get_active_layer
  data_string
  data_text
  data_unselect