examples/spmv/dw_block_spmv.c: unpartition data before unregistering it

examples/spmv/dw_block_spmv.c

@@ -77,7 +77,10 @@ void unregister_data(void)
 {
 	starpu_data_unpartition(sparse_matrix, 0);
 	starpu_data_unregister(sparse_matrix);
+
+	starpu_data_unpartition(vector_in, 0);
 	starpu_data_unregister(vector_in);
+
 	starpu_data_unregister(vector_out);
 }