Edge case on high-temp, southern locations. Tempcal ntd[] is full of nulls out of the model. about newhall HOT 6 CLOSED

None of the conditions to set ntd[] variables in BasicSimulationModel are being 
hit during the execution of these datasets.  These population routines are all 
inside an if() block that checks to see if:

if (tc != 0 || tu != 0) {

These conditions are not being satisfied.

In one of the test datasets, MEAD89, the following is true for its run:

tc = -1, tu = 0

In MEAD89, the tc variable is only ever modified twice, two set it to -1 both 
times.  Conditions to set tc to -1 does not occur in 169013 and 20080.

The condition skipTo890 has been flagged true, setting tc to 0.  Again around 
920, tc is getting set to 0 again, this is because tempUnder8C has been flagged 
false, which speaks toward the kind of datasets that we are encountering this.

Two conditions cause skipTo890 to occur:  np = 0 and wt <= 5

The temperature calculator is short circuiting because no temperatures under 8 
degrees Celsius are being detected.  As such, the entire temperature calendar 
would be full of 8's for "in excess of 8C".

What should occur is the total population of the temperature calendar with 8's. 
 However, I will verify what the BASIC model does under DOS with these datasets.

Added special behavior for this edge case in the model.  Seems to fix 
everything and match FLEXNSM behavior.  Unit tests still required.

Unit tests added, and they pass.  Problem fixed in 1.4.5.