Fixed a bug in CPBarPlot: it was using double precision arithemetic when the data was NSDecimals, and vice versa.
Fixed a bug in CPBarPlot: it was using double precision arithemetic when the data was NSDecimals, and vice versa.

escoz/core-plot,escoz/core-plot,escoz/core-plot,escoz/core-plot,escoz/core-plot