[dia] Make 'make distcheck' pass again

[Hans Breuer <hans src gnome org>]

commit f9e5949449ebcc96a20a9ab45d78ab79be347938
Author: Hans Breuer <hans breuer org>
Date:   Sun May 31 12:34:43 2009 +0200

    Make 'make distcheck' pass again
---
 po/POTFILES.in   |    2 ++
 po/POTFILES.skip |    1 +
 2 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/po/POTFILES.in b/po/POTFILES.in
index 94e947e..3c813e4 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -13,6 +13,8 @@ app/diacanvas.c
 app/diagram.c
 app/diagram_tree.c
 app/diagram_tree_menu.c
+app/diagram_tree_model.c
+app/diagram_tree_view.c
 app/diagram_tree_window.c
 app/diapagelayout.c
 app/disp_callbacks.c
diff --git a/po/POTFILES.skip b/po/POTFILES.skip
index 4e5fde4..7cfd97e 100644
--- a/po/POTFILES.skip
+++ b/po/POTFILES.skip
@@ -1,4 +1,5 @@
 dia.desktop.in
+data/sheets-dialog.xml
 sheets/EML.sheet.in
 po-checktrans.py
 plug-ins/python/otypes.py