Ignore packets of 0 bytes size

src/main.rs

@@ -136,11 +136,13 @@ fn main() -> ! {
                             net::net::clear_pending(cs);
                         });
                         let bytes = net::net::eth_recv(&mut ETH_DATA_BUFFER);
+                        if bytes != 0 {
                             info!("Ts: {:?}", sys_timer::now());
                             debug!("Number of bytes recv: {:?}", bytes);
                             (laser, thermostat, should_reset, device_settings) = net::cmd_handler::execute_cmd(&mut ETH_DATA_BUFFER, bytes, laser, thermostat, device_settings);
                         }
                     }
+                }
                 if has_temp_reading {
                     thermostat.start_tec_readings_conversion();
                 }