corrected warnings when compiling with -Wall -W

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15353 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/radiobut.cpp

@@ -68,7 +68,6 @@ bool wxRadioButton::Create(wxWindow *parent, wxWindowID id,
 
 void wxRadioButton::SetValue(bool val)
 {
-	int i;
 	wxRadioButton *cycle;
 	  if ( GetControlValue( (ControlHandle) m_macControl ) == val )
 	    return ;