mpi/src/nmad/starpu_mpi_nmad.c: fix function prototype

mpi/src/nmad/starpu_mpi_nmad.c

@@ -149,7 +149,7 @@ static void nop_acquire_cb(void *arg)
 }
 
 struct _starpu_mpi_req *_starpu_mpi_isend_irecv_common(starpu_data_handle_t data_handle,
-						       int srcdst, int data_tag, MPI_Comm comm,
+						       int srcdst, starpu_mpi_tag_t data_tag, MPI_Comm comm,
 						       unsigned detached, unsigned sync, int prio, void (*callback)(void *), void *arg,
 						       enum _starpu_mpi_request_type request_type, void (*func)(struct _starpu_mpi_req *),
 						       enum starpu_data_access_mode mode,