hailwat tracer index is uninitialized in setup_pt_NH_BC

[SamuelTrahanNOAA]

Describe the bug
In subroutine setup_pt_NH_BC within fv_nesting.F90, you will find this code:

   integer :: liq_wat, ice_wat, rainwat, snowwat, graupel, hailwat
...
   liq_wat = get_tracer_index (MODEL_ATMOS, 'liq_wat')
   ice_wat = get_tracer_index (MODEL_ATMOS, 'ice_wat')
   rainwat = get_tracer_index (MODEL_ATMOS, 'rainwat')
   snowwat = get_tracer_index (MODEL_ATMOS, 'snowwat')
   graupel = get_tracer_index (MODEL_ATMOS, 'graupel')

...
   if (hailwat > 0) then
      hailwatBC_west  => q_BC(hailwat)%west_t1
      hailwatBC_east  => q_BC(hailwat)%east_t1
      hailwatBC_north => q_BC(hailwat)%north_t1
      hailwatBC_south => q_BC(hailwat)%south_t1
   else
      hailwatBC_west  => dum_west
      hailwatBC_east  => dum_east
      hailwatBC_north => dum_north
      hailwatBC_south => dum_south
   endif

Notice the hailwat is never initialized.

I suspect the correct solution is to add this line:

   hailwat = get_tracer_index (MODEL_ATMOS, 'hailwat')

To Reproduce
There is no straightforward way to reproduce this behavior at runtime, but it is obvious from the code.

Expected behavior
Variables should be initialized and array indexes should be correct.

System Environment
N/A - the error is plainly visible in the source code

Additional context
N/A