fixed wxScrollBar creation when default size was used

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@19394 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/scrolbar.cpp

@@ -180,6 +180,8 @@ bool wxScrollBar::Create(wxWindow *parent, wxWindowID id,
 
     PostCreation();
 
+    SetBestSize(size);
+
     SetBackgroundColour( parent->GetBackgroundColour() );
 
     Show( TRUE );
@@ -334,4 +336,9 @@ void wxScrollBar::ApplyWidgetStyle()
     gtk_widget_set_style( m_widget, m_widgetStyle );
 }
 
+wxSize wxScrollBar::DoGetBestSize() const
+{
+    return wxControl::DoGetBestSize();
+}
+
 #endif