[aravis] python: add a link to the hexadecimal dump blog post.

[Emmanuel Pacaud <emmanuel src gnome org>]

commit 6a41f2ae26c7532fbfdf68736d1f7958ff9878da
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Sun Nov 3 21:46:07 2013 +0100

    python: add a link to the hexadecimal dump blog post.

 tests/python/arv-single-buffer-test.py |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/tests/python/arv-single-buffer-test.py b/tests/python/arv-single-buffer-test.py
index 615d188..91902f2 100644
--- a/tests/python/arv-single-buffer-test.py
+++ b/tests/python/arv-single-buffer-test.py
@@ -34,6 +34,8 @@ import time
 
 from gi.repository import Aravis
 
+# Hexadecimal dump code from http://www.alexonlinux.com/hex-dump-functions
+
 def DumpBuffer (buf, length, caption="", dest=sys.stdout):
        def GetPrintableChar(str):
                if str.isalpha():