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/toolbar/toolbar.cpp

@@ -494,7 +494,7 @@ void MyFrame::PopulateToolbar(wxToolBarBase* toolBar)
     {
         // create a tool with a custom bitmap for testing
         wxImage img(m_pathBmp);
-        if ( img.Ok() )
+        if ( img.IsOk() )
         {
             if ( img.GetWidth() > w && img.GetHeight() > h )
                 img = img.GetSubImage(wxRect(0, 0, w, h));