Reverse the bullet_closed variable result. closed=1 means closed and not...

... open.

This is dependent on PR https://github.com/OS2web/os2web_print_send_to_friend/pull/1 and https://github.com/OS2web/os2web_esdh_provider/pull/5

Major difference:
The field for wheter a mettings bullet is closed or open, are reversed.
If field_os2web_meetings_bul_closed = 1 means that the bullet is closed not open.