fix for the last printf format warning fix

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39714 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/html/htmprint.cpp

@@ -440,7 +440,7 @@ wxString wxHtmlPrintout::TranslateHeader(const wxString& instr, int page)
     num.Printf(wxT("%i"), page);
     r.Replace(wxT("@PAGENUM@"), num);
 
-    num.Printf(wxT("%lu"), m_PageBreaks.Count()-1);
+    num.Printf(wxT("%lu"), (unsigned long)(m_PageBreaks.Count() - 1));
     r.Replace(wxT("@PAGESCNT@"), num);
 
     return r;