Tests for `test_exec_and_aggregate` fail

[dschlaep]

On commit 02c1a0a

1. Failure: Simulate and aggregate (@test_exec_and_aggregate.R#149)  ────────
  `within` not equivalent to TRUE.
  1 element mismatch
  test-data Ex2 - slot PRECIP - timestep Day  max = 4.568 larger than expected 4.37

The value max = 4.568 changes from call to call --> potentially suggesting that code is writing out of bounds?

[dschlaep]

PRECIP output is all wrong (for "Ex2")

          ppt rain snow_fall snowmelt  snowloss
min 0.000000 0.00  0.000000 0.000000 0.0000000
max 5.120956 4.37  5.120956 3.504789 0.2481329

input range are

     Tmax_C Tmin_C PPT_cm
[1,] -26.03 -43.47   0.00
[2,]  33.85  12.29   4.37