[shotwell] Update po/Makevars

[Piotr Drąg <piotrdrag src gnome org>]

commit 32c49a8397078538924fbe8141b4c5f4b421c630
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Thu Apr 27 17:43:56 2017 +0200

    Update po/Makevars

 po/Makevars |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/po/Makevars b/po/Makevars
index c4ecf22..9480715 100644
--- a/po/Makevars
+++ b/po/Makevars
@@ -25,7 +25,7 @@ COPYRIGHT_HOLDER = Translation copyright holder
 # Possible values are "yes", "no", or empty.  If it is empty, try to
 # detect it automatically by scanning the files in $(top_srcdir) for
 # "GNU packagename" string.
-PACKAGE_GNU =
+PACKAGE_GNU = no
 
 # This is the email address or URL to which the translators shall report
 # bugs in the untranslated strings:
@@ -51,7 +51,7 @@ EXTRA_LOCALE_CATEGORIES =
 # context.  Possible values are "yes" and "no".  Set this to yes if the
 # package uses functions taking also a message context, like pgettext(), or
 # if in $(XGETTEXT_OPTIONS) you define keywords with a context argument.
-USE_MSGCTXT = no
+USE_MSGCTXT = yes
 
 # These options get passed to msgmerge.
 # Useful options are in particular: