pidgin/pidgin

Fix a crash on shutdown in kwallet if the wallet was never opened.

The wallet instance variable was not initialized so if the wallet was never opened we were trying to delete and invalid pointer.

Also update the dispose method of the provider to close the wallet as the
tasks in the queue hold a reference to the provider instance as the source
object in their tasks.

Testing Done:
Ran locally with both the kwallet and secret service providers.

Reviewed at https://reviews.imfreedom.org/r/581/
/*
* pidgin
*
* Pidgin is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
#if !defined(PIDGIN_GLOBAL_HEADER_INSIDE) && !defined(PIDGIN_COMPILATION)
# error "only <pidgin.h> may be included directly"
#endif
#ifndef PIDGIN_MESSAGE_H
#define PIDGIN_MESSAGE_H
/**
* SECTION:pidginmessage
* @section_id: pidgin-pidginmessage
* @short_description: <filename>pidginmessage.h</filename>
* @title: Pidgin Message API
*/
#include <purple.h>
#include <talkatu.h>
G_BEGIN_DECLS
#define PIDGIN_TYPE_MESSAGE (pidgin_message_get_type())
G_DECLARE_FINAL_TYPE(PidginMessage, pidgin_message, PIDGIN, MESSAGE, GObject)
/**
* pidgin_message_new:
* @msg: The #PurpleMessage to wrap.
*
* Wraps @msg so that it can be used as a #TalkatuMessage.
*
* Returns: (transfer full): The new #PidginMessage instance.
*/
PidginMessage *pidgin_message_new(PurpleMessage *msg);
/**
* pidgin_message_get_message:
* @msg: The #PidginMessage instance.
*
* Gets the #PurpleMessage that @msg is wrapping.
*
* Returns: (transfer none): The #PurpleMessage that @msg is wrapping.
*/
PurpleMessage *pidgin_message_get_message(PidginMessage *msg);
G_END_DECLS
#endif /* PIDGIN_MESSAGE_H */