add a missing #include

diff --git a/openbox/stacking.c b/openbox/stacking.c
index 63819ae..92a5285 100644 (file)
--- a/openbox/stacking.c
+++ b/openbox/stacking.c
@@ -25,6 +25,7 @@
 #include "group.h"
 #include "frame.h"
 #include "window.h"
+#include "event.h"
 #include "debug.h"
 
 GList  *stacking_list = NULL;