make sure we only perform absolute imports on loading a backend

Andrea Bedini · Andrea Bedini · commit 5f14f6fdb36f · 2013-08-23T11:03:41.000+10:00
Fixes #2309
diff --git a/lib/matplotlib/backends/__init__.py b/lib/matplotlib/backends/__init__.py
@@ -22,7 +22,7 @@ def pylab_setup():
         backend_name = backend_name.lower() # until we banish mixed case
         backend_name = 'matplotlib.backends.%s'%backend_name.lower()
     backend_mod = __import__(backend_name,
-                             globals(),locals(),[backend_name])
+                             globals(),locals(),[backend_name],0)
 
     # Things we pull in from all backends
     new_figure_manager = backend_mod.new_figure_manager
