Correctly detect python version that we didn't tested (I tested again 3.4 and it work ok)

theano/gof/utils.py

@@ -43,7 +43,7 @@ def simple_extract_stack(f=None, limit=None):
     list.reverse()
     return list
 
-if sys.version_info[:2] <= (3, 2):
+if sys.version_info[:2] > (3, 4):
     # I enable my implementation only for some python version just to
     # be sure the Python internal do not change. If this work with
     # other python version, you can enable it.