Added method to point ponters to members of ocean_state_type

- To initialize within the MCT coupler we need access to members
  of ocean_state_type which are private. This method allows us
  to have local pointers to those members.

config_src/coupled_driver/ocean_model_MOM.F90

@@ -89,7 +89,9 @@ module ocean_model_mod
 public ocean_model_restart
 public ice_ocn_bnd_type_chksum
 public ocean_public_type_chksum
-public    ocean_model_data_get
+public ocean_model_data_get
+public get_state_pointers
+
 interface ocean_model_data_get
   module procedure ocean_model_data1D_get
   module procedure ocean_model_data2D_get
@@ -1083,4 +1085,13 @@ subroutine ocean_public_type_chksum(id, timestep, ocn)
 100 FORMAT("   CHECKSUM::",A20," = ",Z20)
 end subroutine ocean_public_type_chksum
 
+!> Returns pointers to objects within ocean_state_type
+subroutine get_state_pointers(OS, grid)
+  type(ocean_state_type),          pointer :: OS !< Ocean state type
+  type(ocean_grid_type), optional, pointer :: grid !< Ocean grid
+
+  if (present(grid)) grid => OS%grid
+
+end subroutine get_state_pointers
+
 end module ocean_model_mod