[gtkmm] Gdk::Pixbuf: Add commented-out get_pixels(length&) with TODO.

[Murray Cumming <murrayc src gnome org>]

commit 0033cbe572410560c09b28b40d49c76aa1945dc7
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Sep 22 09:50:57 2016 +0200

    Gdk::Pixbuf: Add commented-out get_pixels(length&) with TODO.
    
    We can uncomment this after we branch.

 gdk/src/pixbuf.hg |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gdk/src/pixbuf.hg b/gdk/src/pixbuf.hg
index fe4b9d9..4fef3ff 100644
--- a/gdk/src/pixbuf.hg
+++ b/gdk/src/pixbuf.hg
@@ -322,6 +322,7 @@ public:
   _WRAP_METHOD(bool get_has_alpha() const, gdk_pixbuf_get_has_alpha)
   _WRAP_METHOD(int get_bits_per_sample() const, gdk_pixbuf_get_bits_per_sample)
   _WRAP_METHOD(guint8* get_pixels() const, gdk_pixbuf_get_pixels)
+  //TODO: _WRAP_METHOD(guint8* get_pixels(guint& length) const, gdk_pixbuf_get_pixels_with_length)
   _WRAP_METHOD(int get_width() const, gdk_pixbuf_get_width)
   _WRAP_METHOD(int get_height() const, gdk_pixbuf_get_height)
   _WRAP_METHOD(int get_rowstride() const, gdk_pixbuf_get_rowstride)