Correct down/up ratio calculation

[lisa-lthorrold]

I noticed that all the down/up ratio values were either 0 or 1. Tracking back to the code, the backward.size() is an int, and this.forward.size() is an int. int/int = int.

I believe the original author intended to return a proper ratio (double return type), but it doesn't look like they correctly cast one of the values to a double so to ensure correct calculation; instead they casted the value returned by integer division to a double.

[GintsEngelen]

Indeed, I double-checked it and the values I saw for the Down/Up Ratio were all whole numbers. After your fix, I reran the CICFlowMeter tool and the values now correctly reflect (Total Bwd Packets) / (Total Fwd Packets).