Use wxASCII_STR() on string literals

Fix the build with wxNO_IMPLICIT_WXSTRING_ENCODING.

include/wx/control.h

@@ -42,7 +42,7 @@ public:
                 const wxSize& size = wxDefaultSize,
                 long style = 0,
                 const wxValidator& validator = wxDefaultValidator,
-                const wxString& name = wxControlNameStr);
+                const wxString& name = wxASCII_STR(wxControlNameStr));
 
     // get the control alignment (left/right/centre, top/bottom/centre)
     int GetAlignment() const { return m_windowStyle & wxALIGN_MASK; }