fixed problem with pypy

VERSION

@@ -1 +1 @@
-Version 2.0.9 (2012-09-27 21:45:13) stable
+Version 2.0.9 (2012-09-27 22:09:19) stable

gluon/portalocker.py

@@ -140,6 +140,7 @@ class LockedFile(object):
             self.file.close()
             self.file = None
     def __del__(self):
+        if not self.file is None:
             self.close()
         
 def read_locked(filename):