Train station with "all modules full" won't accept trains if it has no module.

Issue description

A train station with no modules should have the condition "all modules full" true at any time. It does not however.

Reproduction steps

1. Create a simple train setup with a train station without any modules.
2. Create a simple train track with other stations around it.
3. Set the initial train station up as "All Modules Full" request
4. Have the train schedule include the initial train station as target
5. Have the train go somewhere else.
6. See that the train will not drive towards that initial train station as "arrival conditions" are not met.

Game version and build number

v0.7.2 (b432)

Operating system

Windows

Note: might be fixed with 0.7.2a due to changelog entry:
Product and mode selection is now hidden for the empty train station module.

Will check at a later point and update here

This was fixed in one of our previous updates. Thanks for reporting it! If it happens again, please file a new issue with a save file attached.