unitialized var initialized (mainly to reduce Purify warnings)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2086 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/tbarbase.cpp

@@ -220,6 +220,7 @@ wxToolBarTool *wxToolBarBase::AddTool(int index, const wxBitmap& bitmap, const w
 void wxToolBarBase::AddSeparator ()
 {
   wxToolBarTool *tool = new wxToolBarTool;
+  tool->m_index = -1;
   tool->m_toolStyle = wxTOOL_STYLE_SEPARATOR;
   m_tools.Append(-1, tool);
 }