[gtk-osx] need a default repo to use branch without repo

[John Ralls <jralls src gnome org>]

commit 374ebe060aa9e3e77af17e36ec96292290ff85e1
Author: Antoine Martin <antoine nagafix co uk>
Date:   Mon Jan 15 16:42:35 2018 +0700

    need a default repo to use branch without repo

 modulesets-stable/gtk-osx-gstreamer.modules |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/modulesets-stable/gtk-osx-gstreamer.modules b/modulesets-stable/gtk-osx-gstreamer.modules
index bed0db5..91bb1e1 100644
--- a/modulesets-stable/gtk-osx-gstreamer.modules
+++ b/modulesets-stable/gtk-osx-gstreamer.modules
@@ -2,7 +2,7 @@
 <!DOCTYPE moduleset SYSTEM "moduleset.dtd">
 <?xml-stylesheet type="text/xsl" href="moduleset.xsl"?>
 <moduleset>
-  <repository type="tarball" name="gstreamer"
+  <repository type="tarball" name="gstreamer" default="yes"
               href="http://gstreamer.freedesktop.org/src/"/>
   <repository type="tarball" name="sourceforge"
               href="http://iweb.dl.sf.net/project/"/>