[gtk+] x11: Replace RROutput with XID as used in GdkX11Monitor

[Rico Tzschichholz <ricotz src gnome org>]

commit 694ba1298ed85ffd8ae6fc8c342c9e7f360d0baa
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Fri May 27 09:27:53 2016 +0200

    x11: Replace RROutput with XID as used in GdkX11Monitor
    
    This avoids an unconditional use of XRandr symbol.

 gdk/x11/gdkscreen-x11.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/x11/gdkscreen-x11.c b/gdk/x11/gdkscreen-x11.c
index 3e608bf..34dfccc 100644
--- a/gdk/x11/gdkscreen-x11.c
+++ b/gdk/x11/gdkscreen-x11.c
@@ -368,7 +368,7 @@ check_is_composited (GdkDisplay *display,
 }
 
 static GdkX11Monitor *
-find_monitor_by_output (GdkX11Display *x11_display, RROutput output)
+find_monitor_by_output (GdkX11Display *x11_display, XID output)
 {
   int i;