[pitivi] flatpak: Do not forget to specify the branch when bundling

[Thibault Saunier <tsaunier src gnome org>]

commit 8c5b0ddad30e285fcce5b5e9a5340dc1276fb068
Author: Thibault Saunier <tsaunier gnome org>
Date:   Wed Dec 7 12:40:53 2016 -0300

    flatpak: Do not forget to specify the branch when bundling

 build/flatpak/pitivi-flatpak |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/build/flatpak/pitivi-flatpak b/build/flatpak/pitivi-flatpak
index a729a17..78f747b 100755
--- a/build/flatpak/pitivi-flatpak
+++ b/build/flatpak/pitivi-flatpak
@@ -474,6 +474,8 @@ class PitiviFlatpak:  # pylint: disable=too-many-instance-attributes
         if self.commit_body:
             build_export_args.append("--body=%s" % self.commit_body)
 
+        build_export_args.append(self.branch)
+
         Console.message('-> Exporting repo %s %s (--body="%s" --subject="%s")',
                         self.repodir, self.branch, self.commit_body,
                         self.commit_subject)