fixed #4394 make the storage of the password optional in .pypirc
diff --git a/Lib/distutils/dist.py b/Lib/distutils/dist.py
index c15ca97..18cc910 100644
--- a/Lib/distutils/dist.py
+++ b/Lib/distutils/dist.py
@@ -206,6 +206,7 @@
         self.extra_path = None
         self.scripts = None
         self.data_files = None
+        self.password = ''
 
         # And now initialize bookkeeping stuff that can't be supplied by
         # the caller at all.  'command_obj' maps command names to