Fix for case when octave include path does not have /octave. Use NOT DEFINED logic to avoid 2^n problem seen by Hazen for n repeat calls to ccmake.
Fix for case when octave include path does not have /octave.
Use NOT DEFINED logic to avoid 2^n problem seen by Hazen for n repeat
calls to ccmake.

svn path=/trunk/; revision=7099

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