weechat is crashing on exit if python plugin is loaded

Description:

if several scripts are used for a python plugin, then weechat crashes after unloading the last one.

Additional info:

• upstream issue for python
• upstream fix for python

I tested this fix.

Steps to reproduce:

1. enable python plugin in weechat
2. load 2 or more python scripts EG: autosort and go
3. try to unload them one by one