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

src/osx/cocoa/notebook.mm

@@ -175,7 +175,7 @@ public:
             if ( notebook.GetImageList() && notebook.GetPageImage(i) >= 0 )
             {
                 const wxBitmap bmap = notebook.GetImageList()->GetBitmap( notebook.GetPageImage( i ) ) ;
-                if ( bmap.Ok() )
+                if ( bmap.IsOk() )
                 {
                     // TODO how to set an image on a tab
                 }