remove top-level default include

src/gui/gtk-base.hpp

@@ -49,7 +49,6 @@
 //--------------------tricky special Include sequence
 
 #include "lib/error.hpp"
-#include "lib/util.hpp"
 
 
 #ifdef ENABLE_NLS

src/gui/workspace/window-list.cpp

@@ -30,6 +30,7 @@
 #include "gui/workspace/ui-manager.hpp"
 #include "gui/workspace/window-list.hpp"
 #include "gui/workspace/workspace-window.hpp"
+#include "lib/util.hpp"
 
 #include <memory>
 #include <list>

src/lib/polymorphic-value.hpp

@@ -154,6 +154,7 @@
 
 #include "lib/error.hpp"
 #include "lib/meta/duck-detector.hpp"
+#include "lib/util.hpp"
 
 #include <boost/utility/enable_if.hpp>
 #include <boost/static_assert.hpp>