Fixed python2.6 support (by removing use of viewvalues on a dict).

Author: pelson

lib/matplotlib/figure.py

@@ -1189,7 +1189,7 @@ def __getstate__(self):
         if getattr(self.canvas, 'manager', None) is not None:
             manager = self.canvas.manager
             import matplotlib._pylab_helpers
-            if manager in matplotlib._pylab_helpers.Gcf.figs.viewvalues():
+            if manager in matplotlib._pylab_helpers.Gcf.figs.values():
                 state['_restore_to_pylab'] = True
 
         return state