[mutter/wip/tintou/workspace-manager-header] meta: Add missing display.h to meta-workspace-manager.h

[Corentin Noël <corentinnoel src gnome org>]

commit 9d390ee49fb1f6300336e82ae94cc8061c6bae12
Author: Corentin Noël <corentin elementary io>
Date:   Wed Jan 29 11:02:33 2020 +0100

    meta: Add missing display.h to meta-workspace-manager.h
    
    This is required because MetaDisplayCorner is only defined in display.h
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/1025

 src/meta/meta-workspace-manager.h | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/meta/meta-workspace-manager.h b/src/meta/meta-workspace-manager.h
index 0390c44e2..92cd68191 100644
--- a/src/meta/meta-workspace-manager.h
+++ b/src/meta/meta-workspace-manager.h
@@ -26,6 +26,7 @@
 #include <glib-object.h>
 
 #include <meta/common.h>
+#include <meta/display.h>
 #include <meta/prefs.h>
 #include <meta/types.h>