prefs: Make init function private

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1833>

src/core/main.c

@@ -79,11 +79,11 @@
 #include "clutter/clutter.h"
 #include "core/display-private.h"
 #include "core/main-private.h"
+#include "core/prefs-private.h"
 #include "core/util-private.h"
 #include "meta/compositor.h"
 #include "meta/meta-backend.h"
 #include "meta/meta-x11-errors.h"
-#include "meta/prefs.h"
 #include "ui/ui.h"
 #include "x11/session.h"
 

src/core/prefs-private.h

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2021 Red Hat Inc.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ */
+
+#ifndef PREFS_PRIVATE_H
+#define PREFS_PRIVATE_H
+
+void meta_prefs_init (void);
+
+#endif /* PREFS_PRIVATE_H */

src/core/prefs.c

@@ -36,6 +36,7 @@
 #include "compositor/meta-plugin-manager.h"
 #include "core/keybindings-private.h"
 #include "core/meta-accel-parse.h"
+#include "core/prefs-private.h"
 #include "core/util-private.h"
 #include "meta/prefs.h"
 #include "x11/meta-x11-display-private.h"