Use semicolon after wxIMPLEMENT_*_CLASS* in wx's own implementations

wxIMPLEMENT_DYNAMIC/ABSTRACT_CLASS* is documented to be used with a
semicolon, though it is not mandatory.

Not touching headers yet, to avoid -pedantic warnings in user code.

See https://github.com/wxWidgets/wxWidgets/pull/2584

src/common/menucmn.cpp

@@ -100,7 +100,7 @@ bool wxMenuBarStreamingCallback( const wxObject *WXUNUSED(object), wxObjectWrite
 
 #if wxUSE_MENUBAR
 wxIMPLEMENT_DYNAMIC_CLASS_XTI_CALLBACK(wxMenuBar, wxWindow, "wx/menu.h", \
-                                       wxMenuBarStreamingCallback)
+                                       wxMenuBarStreamingCallback);
 #endif
 
 #if wxUSE_EXTENDED_RTTI
@@ -187,7 +187,7 @@ wxENUM_MEMBER( wxITEM_RADIO )
 wxEND_ENUM( wxItemKind )
 
 wxIMPLEMENT_DYNAMIC_CLASS_XTI_CALLBACK(wxMenuItem, wxObject, "wx/menuitem.h", \
-                                       wxMenuItemStreamingCallback)
+                                       wxMenuItemStreamingCallback);
 
 wxBEGIN_PROPERTIES_TABLE(wxMenuItem)
 wxPROPERTY( Parent, wxMenu*, SetMenu, GetMenu, wxEMPTY_PARAMETER_VALUE, \