python: unload script interpreters before eval interpreter

The workaround in the previous commit didn't work for one user, so try
unloading the eval interpreter last to see if that helps.

src/plugins/python/weechat-python.c

@@ -1625,12 +1625,12 @@ weechat_plugin_end (struct t_weechat_plugin *plugin)
 {
     /* unload all scripts */
     python_quiet = 1;
+    plugin_script_end (plugin, &python_data);
     if (python_script_eval)
     {
         weechat_python_unload (python_script_eval);
         python_script_eval = NULL;
     }
-    plugin_script_end (plugin, &python_data);
     python_quiet = 0;
 
     /* free python interpreter */