From f02f162df699e199e22e2c3d6d2f173f79d8e0a1 Mon Sep 17 00:00:00 2001
From: Antoine Nguyen <tonio@ngyn.org>
Date: Sat, 13 Dec 2014 17:40:33 +0100
Subject: [PATCH] Convert to str if needed.

see #653
---
 modoboa/extensions/stats/graphics.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/modoboa/extensions/stats/graphics.py b/modoboa/extensions/stats/graphics.py
index c9b1aaeaa..d7f657ba9 100644
--- a/modoboa/extensions/stats/graphics.py
+++ b/modoboa/extensions/stats/graphics.py
@@ -76,6 +76,8 @@ class Graphic(object):
             cmdargs += curve.to_rrd_command_args(rrdfile)
         cmd = "rrdtool xport --start %s --end %s " % (str(start), str(end))
         cmd += " ".join(cmdargs)
+        if type(cmd) is unicode:
+            cmd = cmd.encode("utf-8")
         code, output = exec_cmd(cmd)
         if code:
             return []