Explicitly set (1x1) io_domain as a default

Added code to explicitly set a (1x1) io_domain when no other io_layout is specified, complying with changing requirements for 2020 and later versions of FMS, and following the default behavior of previous versions. All answers are bitwise identical.
NOAA-GFDL · Mar 6, 2021 · a077573 · a077573
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commit a077573
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diff --git a/config_src/infra/FMS1/MOM_domain_infra.F90 b/config_src/infra/FMS1/MOM_domain_infra.F90
@@ -1689,6 +1689,8 @@ subroutine clone_MD_to_d2D(MD_in, mpp_domain, min_halo, halo_size, symmetric, &
   if ((MD_in%io_layout(1) + MD_in%io_layout(2) > 0) .and. &
       (MD_in%layout(1)*MD_in%layout(2) > 1)) then
     call mpp_define_io_domain(mpp_domain, MD_in%io_layout)
+  else
+    call mpp_define_io_domain(mpp_domain, (/ 1, 1 /) )
   endif
 
 end subroutine clone_MD_to_d2D

diff --git a/config_src/infra/FMS2/MOM_domain_infra.F90 b/config_src/infra/FMS2/MOM_domain_infra.F90
@@ -1689,6 +1689,8 @@ subroutine clone_MD_to_d2D(MD_in, mpp_domain, min_halo, halo_size, symmetric, &
   if ((MD_in%io_layout(1) + MD_in%io_layout(2) > 0) .and. &
       (MD_in%layout(1)*MD_in%layout(2) > 1)) then
     call mpp_define_io_domain(mpp_domain, MD_in%io_layout)
+  else
+    call mpp_define_io_domain(mpp_domain, (/ 1, 1 /) )
   endif
 
 end subroutine clone_MD_to_d2D