More unit tests updates for grid 172

Fixes NOAA-EMC#157.

tests/test_w3fi71.f90

@@ -6,5 +6,27 @@ program test_w3fi71
    call w3fi71(igrid, igds, ierr)
    print*,'ierr ',ierr
    print*,'igds ',igds
+
+   if (ierr /= 0) stop 2
+   if (igds(1) /= 0) stop 4
+   if (igds(2) /= 255) stop 6
+   if (igds(3) /= 5) stop 8
+   if (igds(4) /= 690) stop 10
+   if (igds(5) /= 710) stop 12
+   if (igds(6) /= -36899) stop 14
+   if (igds(7) /= -220194) stop 16
+   if (igds(8) /= 0) stop 18
+   if (igds(9) /= -80000) stop 20
+   if (igds(10) /= 12700) stop 22
+   if (igds(11) /= 12700) stop 24
+   if (igds(12) /= 128) stop 26
+   if (igds(13) /= 64) stop 28
+   if (igds(14) /= 0) stop 30
+   if (igds(15) /= 0) stop 32
+   if (igds(16) /= 0) stop 34
+   if (igds(17) /= 0) stop 36
+   if (igds(18) /= 0) stop 38
+
+
    print*,"SUCCESS"
  end program test_w3fi71