Replaced Ok() occurrences with IsOk() throughout trunk.

Additionally renamed wxOSX' private wxNativePrinterDC::Ok() function to IsOk().

Didn't deprecate the various Ok() functions: given the amount of changes already introduced in 3.0 a trivial one like this seems more suitable for after 3.0.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67681 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/animate/anitest.cpp

@@ -293,7 +293,7 @@ void MyFrame::OnOpen(wxCommandEvent& WXUNUSED(event))
         m_animationCtrl->Play();
     #else
         wxFileInputStream stream(filename);
-        if (!stream.Ok())
+        if (!stream.IsOk())
         {
             wxLogError(wxT("Sorry, this animation is not a valid format for wxAnimation."));
             return;