fix lack of pytest import in test_transforms.py

pizzathief · pizzathief · commit ade18905e9fc · 2016-01-21T12:09:07.000+11:00
diff --git a/lib/matplotlib/tests/test_transforms.py b/lib/matplotlib/tests/test_transforms.py
@@ -21,6 +21,7 @@
 import matplotlib.pyplot as plt
 import matplotlib.path as mpath
 import matplotlib.patches as mpatches
+import pytest
 
 
 @cleanup
