[mutter] core: move backend setting to helper function

[Ray Strode <halfline src gnome org>]

commit db4355ba1e76dc3186b2fa1e76a1277e0b8bb25d
Author: Ray Strode <rstrode redhat com>
Date:   Wed Dec 17 12:48:06 2014 -0500

    core: move backend setting to helper function
    
    This paves the way for making the backend setting
    be more automatic.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=741666

 src/core/main.c |   26 ++++++++++++++++----------
 1 files changed, 16 insertions(+), 10 deletions(-)
---
diff --git a/src/core/main.c b/src/core/main.c
index 3189f84..ec9b589 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -291,6 +291,21 @@ on_sigterm (gpointer user_data)
   return G_SOURCE_REMOVE;
 }
 
+static void
+init_backend (void)
+{
+#if defined(CLUTTER_WINDOWING_EGL) && defined(HAVE_NATIVE_BACKEND)
+  if (opt_display_server)
+    clutter_set_windowing_backend (CLUTTER_WINDOWING_EGL);
+  else
+#endif
+    clutter_set_windowing_backend (CLUTTER_WINDOWING_X11);
+
+#ifdef HAVE_WAYLAND
+  meta_set_is_wayland_compositor (opt_wayland);
+#endif
+}
+
 /**
  * meta_init: (skip)
  *
@@ -323,16 +338,7 @@ meta_init (void)
   if (g_getenv ("MUTTER_DEBUG"))
     meta_set_debugging (TRUE);
 
-#if defined(CLUTTER_WINDOWING_EGL) && defined(HAVE_NATIVE_BACKEND)
-  if (opt_display_server)
-    clutter_set_windowing_backend (CLUTTER_WINDOWING_EGL);
-  else
-#endif
-    clutter_set_windowing_backend (CLUTTER_WINDOWING_X11);
-
-#ifdef HAVE_WAYLAND
-  meta_set_is_wayland_compositor (opt_wayland);
-#endif
+  init_backend ();
 
   if (g_get_home_dir ())
     if (chdir (g_get_home_dir ()) < 0)