pidgin/pidgin

Add config.h in another header that needs it.

2020-07-27, Elliott S
81417b812648
Add config.h in another header that needs it.

Actually, some irc C files check `HAVE_CYRUS_SASL` too, and probably
were not compiling with it since they don't seem to include the config
either.

Testing Done:
Compile only

Reviewed at https://reviews.imfreedom.org/r/52/
#ifndef PIDGIN_ABOUT_H
#define PIDGIN_ABOUT_H
/**
* SECTION:pidginabout
* @section_id: pidgin-about
* @short_description: <filename>pidginabout.h</filename>
* @title: About Dialog
*/
#include <gtk/gtk.h>
G_BEGIN_DECLS
#define PIDGIN_TYPE_ABOUT_DIALOG (pidgin_about_dialog_get_type())
G_DECLARE_FINAL_TYPE(PidginAboutDialog, pidgin_about_dialog, PIDGIN,
ABOUT_DIALOG, GtkDialog)
GtkWidget *pidgin_about_dialog_new(void);
G_END_DECLS
#endif /* PIDGIN_ABOUT_H */