From 19dc6a7c14d01452fff920e60644520c2a98996e Mon Sep 17 00:00:00 2001
From: Thomas Gambier <thomas.gambier@gmail.com>
Date: Tue, 6 Mar 2018 15:10:23 +0100
Subject: [PATCH] Fix rrdtool.graph python binding

It was failing with 'munmap_chunk(): invalid pointer' error in python 3.6.3
---
 bindings/python/rrdtoolmodule.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bindings/python/rrdtoolmodule.c b/bindings/python/rrdtoolmodule.c
index eeefb581..9a11945d 100644
--- a/bindings/python/rrdtoolmodule.c
+++ b/bindings/python/rrdtoolmodule.c
@@ -595,7 +595,7 @@ _rrdtool_graph(PyObject *Py_UNUSED(self), PyObject *args)
     PyObject *ret;
     int xsize, ysize, i, status;
     double ymin, ymax;
-    char **calcpr;
+    char **calcpr = NULL;
 
     if (convert_args("graph", args, &rrdtool_argv, &rrdtool_argc) == -1)
         return NULL;
-- 
2.47.2