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/generic/calctrlg.cpp

@@ -1002,13 +1002,13 @@ void wxGenericCalendarCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
                             colBg = attr->GetBackgroundColour();
                         }
 
-                        if ( colFg.Ok() )
+                        if ( colFg.IsOk() )
                         {
                             dc.SetTextForeground(colFg);
                             changedColours = true;
                         }
 
-                        if ( colBg.Ok() )
+                        if ( colBg.IsOk() )
                         {
                             dc.SetTextBackground(colBg);
                             changedColours = true;