From 3fbd1eb1567210f2273c18241648d0d1596dc06d Mon Sep 17 00:00:00 2001
From: Kyle Wilcox <kyle@axiomdatascience.com>
Date: Fri, 10 Jul 2015 10:29:31 -0400
Subject: [PATCH] 0.0 resolves to False in this Python gotcha, compare to None.
  Fixes #50.

Former-commit-id: 688a32a4908b786670a2c8580aa76ebfe9fb4822
---
 wms/mpl_handler.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wms/mpl_handler.py b/wms/mpl_handler.py
index 2691bda..f2c6665 100644
--- a/wms/mpl_handler.py
+++ b/wms/mpl_handler.py
@@ -113,7 +113,7 @@ def quiver_response(lon,
     # Set to black like ncWMS?
     # Configurable by user?
     norm = None
-    if cmin and cmax:
+    if cmin is not None and cmax is not None:
         mags[mags > cmax] = cmax
         mags[mags < cmin] = cmin
         bounds = np.linspace(cmin, cmax, 15)