[lmi] wxDialog::OnOK() removed from wx

[Greg Chicares]

Vadim--A few weeks ago, you mentioned that wxDialog::OnOK() has
been removed from the latest version of wx, and said there were
two ways to deal with situations where 'lmi' calls that function:

(1) Rewrite the code that calls it.

The 'lmi' trunk's wxID_OK handler is indeed not necessary, but
the 'skeleton' trunk does need it--so this is not the universal
solution, and we need to consider the alternative....

(2) Write its body inline. In wxmsw, this is simply

  if ( Validate() && TransferDataFromWindow() )
  {
      EndDialog(wxID_OK);
  }

However, in the 20060605 wx snapshot that we're still using in
production, there are numerous instances of that function:
  gtk/dialog.cpp
  gtk1/dialog.cpp
  mac/carbon/dialog.cpp
  mac/classic/dialog.cpp
  motif/dialog.cpp
  msw/dialog.cpp
  os2/dialog.cpp
  palmos/dialog.cpp
  univ/dialog.cpp
not all of which are identical. For instance, wxuniv has an empty
function body, while wxgtk has the following

    if (Validate() && TransferDataFromWindow())
    {
        if (IsModal())
        {
            EndModal(wxID_OK);
        }
        else
        {
            SetReturnCode(wxID_OK);
            Show(false);
        }
    }

which isn't the same as the wxmsw version. Have those different
implementations all been made identical in the latest wx sources?
I'd like to avoid introducing any avoidable platform dependency.