fixed TABs positioning inside <pre> so that tags don't throw it apart

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@52659 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/html/m_pre.cpp

@@ -41,10 +41,8 @@ static wxString LINKAGEMODE HtmlizeWhitespaces(const wxString& str)
                 while (i < len && str[i] != wxT('>'))
                 {
                     out << str[i++];
-                    linepos++;
                 }
                 out << wxT('>');
-                linepos++;
                 break;
             case wxT(' '):
                 out << wxT("&nbsp;");