[gtk/grab-leftovers] Fix the build

[Matthias Clasen <matthiasc src gnome org>]

commit ffe46664fde2c7b5c65cea3628a2aa6debf59f9d
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Apr 23 13:45:40 2020 -0400

    Fix the build

 gtk/gtkapplicationaccels.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gtk/gtkapplicationaccels.c b/gtk/gtkapplicationaccels.c
index de4aafe378..3243b16a07 100644
--- a/gtk/gtkapplicationaccels.c
+++ b/gtk/gtkapplicationaccels.c
@@ -23,6 +23,7 @@
 
 #include "gtkapplicationaccelsprivate.h"
 
+#include "gtkaccelgroup.h"
 #include "gtkactionmuxerprivate.h"
 #include "gtkshortcut.h"
 #include "gtkshortcutaction.h"