pidgin/pidgin

Use G_DECLARE_DERIVABLE_TYPE for PurpleConversation and additional cleanups

The setters for PurpleConversation are kind of crappy because of the
conversation cache in the purple_conversations api, which we'll address at a
later time.

Testing Done:
Compiled and ran locally, parted a chat and just signed out to verify no new issues.

Reviewed at https://reviews.imfreedom.org/r/613/
/* purple
*
* Purple 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.
*
* Rewritten from scratch during Google Summer of Code 2012
* by Tomek Wasilczyk (http://www.wasilczyk.pl).
*
* Previously implemented by:
* - Arkadiusz Miskiewicz <misiek@pld.org.pl> - first implementation (2001);
* - Bartosz Oler <bartosz@bzimage.us> - reimplemented during GSoC 2005;
* - Krzysztof Klinikowski <grommasher@gmail.com> - some parts (2009-2011).
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#ifndef PURPLE_GG_VALIDATOR_H
#define PURPLE_GG_VALIDATOR_H
#include <purple.h>
gboolean ggp_validator_password(PurpleRequestField *field, gchar **errmsg,
void *user_data);
gboolean ggp_validator_password_equal(PurpleRequestField *field, gchar **errmsg,
void *field2);
#endif /* PURPLE_GG_VALIDATOR_H */