Data containing value +/-Inf are not plotted in a chart

What steps will reproduce the problem?
1. Open an acquisition containing Inf value (see file in the issue 21)
2. Drag a measure to a chart (Marker '0' in the file skeleton_3d_23h38m21.c3d)

What is the expected output? What do you see instead?
You should be able to see the values plotted in the chart but there is nothing. 
The label of the plotted data is append in the plot' options.

The values -Inf must be responsible as there is no problem for the other data.

Original issue reported on code.google.com by arnaud.barre on 10 Jan 2012 at 5:29

Jasvirbahl / b-tk

Data containing value +/-Inf are not plotted in a chart #23