void wxGCDC::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *height,
wxCoord *descent, wxCoord *externalLeading ,
- wxFont *theFont ) const
+ const wxFont *theFont ) const
{
wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoGetTextExtent - invalid DC") );