Don't call base class SetLabel() from GTKSetLabelForLabel().

Calling wxControlBase::SetLabel() only from GTKSetLabelForLabel() made its
behaviour inconsistent with GTKSetLabelWithMarkupForLabel() and also was
redundant in all but two places from which it was called, so remove this call
from this function itself and instead add it to its callers where it's really
needed.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67054 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/radiobut.cpp

@@ -99,6 +99,9 @@ void wxRadioButton::SetLabel( const wxString& label )
 {
     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 
+    // save the original label
+    wxControlBase::SetLabel(label);
+
     GTKSetLabelForLabel(GTK_LABEL(GTK_BIN(m_widget)->child), label);
 }