No need for bestmaxFrameSizeForScreenSize to be declared publicly

It is used only inside vcl, and it should stay that way.

Change-Id: Ia1a14ab13cb7d3580771c880f959abb2b695b032
Reviewed-on: https://gerrit.libreoffice.org/44698Reviewed-by: Tor Lillqvist <tml@collabora.com>
Tested-by: Tor Lillqvist <tml@collabora.com>

include/vcl/layout.hxx

@@ -654,8 +654,6 @@ public:
         VclMultiLineEdit *pSecondaryMessage);
 };
 
-VCL_DLLPUBLIC Size bestmaxFrameSizeForScreenSize(const Size &rScreenSize);
-
 //Get first window of a pTopLevel window as
 //if any intermediate layout widgets didn't exist
 //i.e. acts like pChild = pChild->GetWindow(GetWindowType::FirstChild);

vcl/inc/window.h

@@ -78,6 +78,8 @@ namespace dnd {
     class XDropTarget;
 }}}}}
 
+VCL_DLLPUBLIC Size bestmaxFrameSizeForScreenSize(const Size &rScreenSize);
+
 bool ImplWindowFrameProc( vcl::Window* pInst, SalEvent nEvent, const void* pEvent );
 
 struct ImplWinData

vcl/qt5/Qt5Frame.cxx

@@ -33,6 +33,7 @@
 #include <QtWidgets/QApplication>
 
 #include <saldatabasic.hxx>
+#include <window.h>
 #include <vcl/layout.hxx>
 #include <vcl/syswin.hxx>
 

vcl/unx/generic/window/salframe.cxx

@@ -61,6 +61,7 @@
 
 #include <unx/gensys.h>
 #include <sallayout.hxx>
+#include <window.h>
 
 #include <sal/macros.h>
 #include <com/sun/star/uno/Exception.hpp>

vcl/unx/gtk/gtksalframe.cxx

@@ -54,6 +54,7 @@
 #include <dlfcn.h>
 #include <vcl/salbtype.hxx>
 #include <impbmp.hxx>
+#include <window.h>
 #include <strings.hrc>
 #include <bitmaps.hlst>
 #include <sal/macros.h>

vcl/unx/gtk3/gtk3gtkframe.cxx

@@ -59,6 +59,7 @@
 #include <dlfcn.h>
 #include <vcl/salbtype.hxx>
 #include <impbmp.hxx>
+#include <window.h>
 #include <strings.hrc>
 #include <bitmaps.hlst>
 #include <sal/macros.h>