Fix possible infinite loop in the control stream write template functions.

LUFA/Drivers/USB/Core/XMEGA/Template/Template_Endpoint_Control_W.c

@@ -81,6 +81,8 @@ uint8_t TEMPLATE_FUNC_NAME (const void* const Buffer,
 		  return ENDPOINT_RWCSTREAM_DeviceDisconnected;
 		else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
 		  return ENDPOINT_RWCSTREAM_BusSuspended;
+		else if (Endpoint_IsSETUPReceived())
+		  return ENDPOINT_RWCSTREAM_HostAborted;
 	}
 
 	return ENDPOINT_RWCSTREAM_NoError;