[JHV 2.0] Frame rate calculation

[Juan Pablo]

In the class J2KRender the frame rate is calculated as follows:

NumberFormat formatter = new DecimalFormat("0.0");
double fps = Double.valueOf(formatter.format(frameRate));

this produces an exception, at least in computers like the mine where the decimal symbol is ',' (comma) instead of the '.' (point). If the aim is only to reduce the number "frameRate" to just one decimal, maybe one more international solution would be:

double fps = (double)Math.round(frameRate * 10.0) / 10.0;