werkzeug.local: fix Proxy.{__enter__,__exit__,__coerce__}

werkzeug.local.Proxy.{__enter__,__exit__,__coerce__} were not implemented
correctly thus triggering "RuntimeError: maximum recursion depth exceeded"

Signed-off-by: Armin Ronacher <armin.ronacher@active-4.com>

werkzeug/local.py

@@ -389,6 +389,6 @@ def __delslice__(self, i, j):
     __oct__ = lambda x: oct(x._get_current_object())
     __hex__ = lambda x: hex(x._get_current_object())
     __index__ = lambda x: x._get_current_object().__index__()
-    __coerce__ = lambda x, o: x.__coerce__(x, o)
-    __enter__ = lambda x: x.__enter__()
-    __exit__ = lambda x, *a, **kw: x.__exit__(*a, **kw)
+    __coerce__ = lambda x, o: x._get_current_object().__coerce__(x, o)
+    __enter__ = lambda x: x._get_current_object().__enter__()
+    __exit__ = lambda x, *a, **kw: x._get_current_object().__exit__(*a, **kw)