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/msw/registry.cpp

@@ -1235,7 +1235,7 @@ bool wxRegKey::Export(const wxString& filename) const
 
     wxFFileOutputStream ostr(filename, wxT("w"));
 
-    return ostr.Ok() && Export(ostr);
+    return ostr.IsOk() && Export(ostr);
 #else
     wxUnusedVar(filename);
     return false;