[shotwell] Fix issue with non-distributed ui files

[Jens Georg <jensgeorg src gnome org>]

commit 5b2490388036237c82dd8837fc9267ea6b88ff57
Author: Jens Georg <mail jensge org>
Date:   Mon Mar 13 20:40:38 2017 +0100

    Fix issue with non-distributed ui files
    
    Signed-off-by: Jens Georg <mail jensge org>

 ui/Makefile.am |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/ui/Makefile.am b/ui/Makefile.am
index 72d5a40..73bb976 100644
--- a/ui/Makefile.am
+++ b/ui/Makefile.am
@@ -11,11 +11,12 @@ dist_noinst_DATA = \
        offline.ui \
        photo_context.ui \
        photo.ui \
+       printing_widget.ui \
        savedsearch.ui \
        search_bar.ui \
        search_sidebar_context.ui \
        set_background_dialog.ui \
-       set_background_slideshow_dialog.ui
+       set_background_slideshow_dialog.ui \
        shotwell.ui \
        sidebar_default_context.ui \
        tag_sidebar_context.ui \