Fixed test bench

src/test/tb_vme_bus.vhd

@@ -872,6 +872,8 @@ begin
 
         -- Release bus
         vme_ds_n_i <= "11";
+        vme_as_n_i <= '1';
+        vme_dtack_n_i <= '1';
         wait for 10 ns;
         check_equal(vme_berr_n_o, '0');
         wait for 10 ns;