Currently, when grid intensity for any system segment is set to 0 the calculation will default to the Global Average Grid Intensity. This is not right, as the user has passed in a value for a reason and this should be respected in the calculations.
Currently, when the data reload percentage is set to 0 the default value of 0.02 is used instead.
Currently, when the first or returning visitor percentage is set to 0 the default values (0.75 and 0.25) are used instead.
Fix for #173
Fixes the situations below:
0the calculation will default to the Global Average Grid Intensity. This is not right, as the user has passed in a value for a reason and this should be respected in the calculations.0the default value of0.02is used instead.0the default values (0.75and0.25) are used instead.