Fixed #213 -- Improved formfields.TimeField.html2python() so that it …

…doesn't fail for None input

git-svn-id: http://code.djangoproject.com/svn/django/trunk@702 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/formfields.py

@@ -652,7 +652,7 @@ def html2python(data):
             except ValueError: # seconds weren't provided
                 time_tuple = time.strptime(data, '%H:%M')
             return datetime.time(*time_tuple[3:6])
-        except ValueError:
+        except (ValueError, TypeError):
             return None
     html2python = staticmethod(html2python)