[gtk+/gtk-3-22] Avoid unused variable warnings

[Daniel Boles <dboles src gnome org>]

commit 80a177db8b5cb0455d428a11d6dc97429dcbcfb3
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Mar 23 16:15:00 2017 +0000

    Avoid unused variable warnings

 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 96c9eee..7bf9979 100644
--- a/gdk/x11/gdkscreen-x11.c
+++ b/gdk/x11/gdkscreen-x11.c
@@ -1040,13 +1040,13 @@ _gdk_x11_screen_get_edge_monitors (GdkScreen *screen,
                                    gint      *left,
                                    gint      *right)
 {
+#ifdef HAVE_XFREE_XINERAMA
   GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
   gint          top_most_pos = x11_screen->height;
   gint          left_most_pos = x11_screen->width;
   gint          bottom_most_pos = 0;
   gint          right_most_pos = 0;
   gint          i;
-#ifdef HAVE_XFREE_XINERAMA
   XineramaScreenInfo *x_monitors;
   int x_n_monitors;
 #endif