[LyX/2.0.x] Fix obvious oversight.

[Richard Heck]

commit 92e574a70da0f03aa8d1fc3681232e959efb5df9
Author: Richard Heck <rgh...@lyx.org>
Date:   Fri Aug 30 13:17:53 2013 -0400

    Fix obvious oversight.

diff --git a/src/insets/InsetTOC.cpp b/src/insets/InsetTOC.cpp
index bac2f43..ba8ef26 100644
--- a/src/insets/InsetTOC.cpp
+++ b/src/insets/InsetTOC.cpp
@@ -103,7 +103,7 @@ docstring InsetTOC::xhtml(XHTMLStream &, OutputParams const 
& op) const
        odocstringstream ods;
        XHTMLStream xs(ods);
 
-       Toc const & toc = buffer().tocBackend().toc("tableofcontents");
+       Toc const & toc = 
buffer().masterBuffer()->tocBackend().toc("tableofcontents");
        if (toc.empty())
                return docstring();