[gtk+] Avoid unused variable warnings

[Matthias Clasen <matthiasc src gnome org>]

commit 6963d9e2ee3fc9fb1dee4ded62f332c8dd878f51
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 5011155..fb27fdc 100644
--- a/gdk/x11/gdkscreen-x11.c
+++ b/gdk/x11/gdkscreen-x11.c
@@ -919,6 +919,7 @@ _gdk_x11_screen_get_edge_monitors (GdkScreen *screen,
                                    gint      *left,
                                    gint      *right)
 {
+#ifdef HAVE_XFREE_XINERAMA
   GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
   GdkWindow    *root_window = gdk_screen_get_root_window (screen);
   gint          top_most_pos = gdk_window_get_height (root_window);
@@ -926,7 +927,6 @@ _gdk_x11_screen_get_edge_monitors (GdkScreen *screen,
   gint          bottom_most_pos = 0;
   gint          right_most_pos = 0;
   gint          i;
-#ifdef HAVE_XFREE_XINERAMA
   XineramaScreenInfo *x_monitors;
   int x_n_monitors;
 #endif