[FIX] we probably want to save the session even if the code throws some kind of exception

bzr revid: xmo@openerp.com-20110920215137-j97tgkvekv6v2850

addons/web/common/http.py

@@ -20,6 +20,7 @@ def session(request, storage_path, session_cookie='sessionid'):
     else:
         request.session = session_store.new()
 
-    yield request.session
-
-    session_store.save(request.session)
+    try:
+        yield request.session
+    finally:
+        session_store.save(request.session)