[rkward] rkward/windows: Another missing include file

[Thomas Friedrichsmeier]

Git commit d713ce77e077b426d9d81a22f558f71dfa832615 by Thomas Friedrichsmeier.
Committed on 26/07/2019 at 20:32.
Pushed by tfry into branch 'master'.

Another missing include file

M  +2    -1    rkward/windows/rktoolwindowbar.cpp

https://commits.kde.org/rkward/d713ce77e077b426d9d81a22f558f71dfa832615

diff --git a/rkward/windows/rktoolwindowbar.cpp b/rkward/windows/rktoolwindowbar.cpp
index a8f5cbdb..03c405e3 100644
--- a/rkward/windows/rktoolwindowbar.cpp
+++ b/rkward/windows/rktoolwindowbar.cpp
@@ -2,7 +2,7 @@
                           rktoolwindowbar  -  description
                              -------------------
     begin                : Fri Oct 12 2007
-    copyright            : (C) 2007-2018 by Thomas Friedrichsmeier
+    copyright            : (C) 2007-2019 by Thomas Friedrichsmeier
     email                : thomas.friedrichsmeier at kdemail.net
  ***************************************************************************/
 
@@ -27,6 +27,7 @@
 
 #include <QSplitter>
 #include <QContextMenuEvent>
+#include <QHBoxLayout>
 
 #include "rkworkplace.h"
 #include "rkworkplaceview.h"