add is_ice (#1155) (#1163)

Co-authored-by: Travis Elless <113720457+TravisElless-NOAA@users.noreply.github.com>

Author: DavidHuber-NOAA

sorc/global_cycle.fd/cycle.F90

@@ -1581,6 +1581,7 @@ subroutine tf_thaw_set(tf_ij,mask_ij,itile,jtile,tice,tclm,tf_thaw,nx,ny, &
  tf(:,:)   = reshape(tf_ij,(/nx,ny/) )
 
  tf_thaw = bmiss
+ is_ice = .false.
 
  do krad = 1, max_search