Remember to set nbagg single-shot timer to None when stopped

joferkington · joferkington · commit 825157fe57e2 · 2015-08-11T06:29:51.000-05:00
diff --git a/lib/matplotlib/backends/backend_nbagg.py b/lib/matplotlib/backends/backend_nbagg.py
@@ -192,7 +192,8 @@ def _timer_stop(self):
             ioloop.remove_timeout(self._timer)
         else:
             self._timer.stop()
-            self._timer = None
+
+        self._timer = None
 
     def _timer_set_interval(self):
         # Only stop and restart it if the timer has already been started
