small upgrade following code review.

theano/gof/tests/test_vm.py

@@ -295,8 +295,8 @@ class RunOnce(theano.Op):
 def test_vm_gc():
     """This already caused a bug in the trunk of Theano.
 
-    The bug was introduced in the trunk the July 5, 2012 andfixed the
-    July 27
+    The bug was introduced in the trunk the July 5, 2012 and fixed the
+    July 30
 
     """
     pass

theano/gof/vm.py

@@ -25,9 +25,9 @@ AddConfigVar('profile_optimizer',
 
 
 def filter_vm_lazy(val):
-    if val == 'False':
+    if val == 'False' or val is False:
         return False
-    elif val == 'True':
+    elif val == 'True' or val is True:
         return True
     elif val == 'None':
         return None