Add example 29 to the valid examples list for the swig-generated octave bindings.
Add example 29 to the valid examples list for the swig-generated
octave bindings.

svn path=/trunk/; revision=11413

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot