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/opengl/penguin/penguin.cpp

@@ -223,7 +223,7 @@ void TestGLCanvas::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 void TestGLCanvas::LoadDXF(const wxString& filename)
 {
     wxFileInputStream stream(filename);
-    if (stream.Ok())
+    if (stream.IsOk())
 #if wxUSE_ZLIB
     {
         if (filename.Right(3).Lower() == wxT(".gz"))