Merge branch 'vector-reverse-iter'

Fix wxVector reverse iterator base().

See https://github.com/wxWidgets/wxWidgets/pull/1948

src/gtk/infobar.cpp

@@ -323,7 +323,7 @@ void wxInfoBar::RemoveButton(wxWindowID btnid)
         if (i->id == btnid)
         {
             gtk_widget_destroy(i->button);
-            buttons.erase(i.base());
+            buttons.erase(i.base() - 1);
 
             // see comment in GTKAddButton()
             InvalidateBestSize();