[gstreamermm] Gst::AudioBaseSink: increase refcount of returned buffer in create_ring_buffer()

[Marcin Kolny <mkolny src gnome org>]

commit 20090e4db48fa30e193be2637e881add4cb6d3d4
Author: Marcin Kolny <marcin kolny gmail com>
Date:   Sat May 5 13:01:44 2018 +0100

    Gst::AudioBaseSink: increase refcount of returned buffer in create_ring_buffer()

 gstreamer/src/audiobasesink.hg |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gstreamer/src/audiobasesink.hg b/gstreamer/src/audiobasesink.hg
index 7b6e57f..7809c40 100644
--- a/gstreamer/src/audiobasesink.hg
+++ b/gstreamer/src/audiobasesink.hg
@@ -109,7 +109,7 @@ public:
 
   /** vfunc to create and return a Gst::AudioRingBuffer to write to.
    */
-  _WRAP_VFUNC(Glib::RefPtr<Gst::AudioRingBuffer> create_ring_buffer(), "create_ringbuffer")
+  _WRAP_VFUNC(Glib::RefPtr<Gst::AudioRingBuffer> create_ring_buffer(), "create_ringbuffer", refreturn_ctype)
 
   /** vfunc to payload data in a format suitable to write to the sink. If no
    * payloading is required, returns a reffed copy of the original