fixing warnings in osx cocoa

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@59778 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/cocoa/checkbox.mm

@@ -17,13 +17,13 @@
 #include "wx/osx/private.h"
 
 wxWidgetImplType* wxWidgetImpl::CreateCheckBox( wxWindowMac* wxpeer, 
-                                    wxWindowMac* parent, 
-                                    wxWindowID id, 
-                                    const wxString& label,
+                                    wxWindowMac* WXUNUSED(parent), 
+                                    wxWindowID WXUNUSED(id), 
+                                    const wxString& WXUNUSED(label),
                                     const wxPoint& pos, 
                                     const wxSize& size,
                                     long style, 
-                                    long extraStyle) 
+                                    long WXUNUSED(extraStyle)) 
 {
     NSRect r = wxOSXGetFrameForControl( wxpeer, pos , size ) ;
     wxNSButton* v = [[wxNSButton alloc] initWithFrame:r];