Give a nice error message when Graphviz is not installed. Closes issue #168.

1 files changed, 3 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index f8129cc..052569f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -13,6 +13,9 @@ ChangeLog for Pylint
      This prevents a crash which can occur when an object doesn't have
      .qname() method after the inference.
 
+    * Don't crash if graphviz is not installed, instead emit a
+      warning letting the user to know.
+
     * Don't emit super-on-old-class on classes with unknown bases.
       Closes issue #721.