pidgin/pidgin

Rename gtkstyle.[ch] to pidginstyle.[ch] and fix up the dark mode check.

Testing Done:
* Ran with arc-dark and adwatia.
* Stepped through the debugger to make sure it was detected right.
* Joined a muc with both themes, the colors change but there're impossible to see as most of that code is elsewhere and not addressed in this review request.
* Also noticed that nicks in mucs are doubled, not sure what, but it's that way with out this patch as well.

Reviewed at https://reviews.imfreedom.org/r/208/
/* 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.
*
* 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_NOVELL_NOVELL_H
#define PURPLE_NOVELL_NOVELL_H
#include <gmodule.h>
#include <purple.h>
#define NOVELL_TYPE_PROTOCOL (novell_protocol_get_type())
#define NOVELL_PROTOCOL(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), NOVELL_TYPE_PROTOCOL, NovellProtocol))
#define NOVELL_PROTOCOL_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), NOVELL_TYPE_PROTOCOL, NovellProtocolClass))
#define NOVELL_IS_PROTOCOL(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), NOVELL_TYPE_PROTOCOL))
#define NOVELL_IS_PROTOCOL_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), NOVELL_TYPE_PROTOCOL))
#define NOVELL_PROTOCOL_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), NOVELL_TYPE_PROTOCOL, NovellProtocolClass))
typedef struct
{
PurpleProtocol parent;
} NovellProtocol;
typedef struct
{
PurpleProtocolClass parent_class;
} NovellProtocolClass;
/**
* Returns the GType for the NovellProtocol object.
*/
G_MODULE_EXPORT GType novell_protocol_get_type(void);
#endif /* PURPLE_NOVELL_NOVELL_H */