Layout the immediate parent of the info bar as described in the docs, not the top-level parent.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63613 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/infobar.cpp

@@ -229,7 +229,7 @@ wxShowEffect wxInfoBarGeneric::GetHideEffect() const
 
 void wxInfoBarGeneric::UpdateParent()
 {
-    wxWindow * const parent = wxGetTopLevelParent(GetParent());
+    wxWindow * const parent = GetParent();
     parent->Layout();
 }