From 1e76ab86919237392ca6ce0ab1b608afbbab6110 Mon Sep 17 00:00:00 2001
From: bblay <byronblay@googlemail.com>
Date: Tue, 18 Sep 2012 14:23:11 +0100
Subject: [PATCH] Fixed bug in MaxNLocator.bin_boundaries

---
 lib/matplotlib/ticker.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/matplotlib/ticker.py b/lib/matplotlib/ticker.py
index 620223b16c0b..a0a85cf43f2d 100644
--- a/lib/matplotlib/ticker.py
+++ b/lib/matplotlib/ticker.py
@@ -1237,8 +1237,8 @@ def bin_boundaries(self, vmin, vmax):
         scale, offset = scale_range(vmin, vmax, nbins)
         if self._integer:
             scale = max(1, scale)
-        vmin -= offset
-        vmax -= offset
+        vmin = vmin - offset
+        vmax = vmax - offset
         raw_step = (vmax-vmin)/nbins
         scaled_raw_step = raw_step/scale
         best_vmax = vmax