Bump allowed version of uncrustify from 0.55 to 0.56.
Bump allowed version of uncrustify from 0.55 to 0.56.

svn path=/trunk/; revision=11173

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