fix: Reloaded chokes on modules without __file__

Fixes #1455 (again)

bottle.py

@@ -3997,7 +3997,7 @@ def run(self):
  files = dict()
 
  for module in list(sys.modules.values()):
- path = getattr(module, '__file__') or ''
+ path = getattr(module, '__file__', '') or ''
  if path[-4:] in ('.pyo', '.pyc'): path = path[:-1]
  if path and exists(path): files[path] = mtime(path)