Juan 14/11/2023:init_mnh.f90, add initialisation of GPU halo with INIT_HALO_D...

Juan 14/11/2023:init_mnh.f90, add initialisation of GPU halo with INIT_HALO_D , to avoid some potentiel null pointer a first GET_HALO_D call

src/MNH/init_mnh.f90

@@ -103,6 +103,7 @@ USE MODI_RESET_EXSEG
 !
 #ifdef MNH_OPENACC
 USE MODE_MNH_ZWORK
+USE MODD_HALO_D
 #endif
 !
 !
@@ -226,6 +227,7 @@ ENDDO
 !
 #ifdef MNH_OPENACC
 CALL MNH_ALLOC_ZWORK(NMODEL)
+CALL INIT_HALO_D()
 #endif
 !
 !-------------------------------------------------------------------------------