[raiguard][2.0.55] furnace fluidbox input breaks if any connection is input-output

[Quezler]

- install the mod
- create new world
- /cheat all
- grab washbox from the power poles and pipes category
- place one
- connect infinity pipe with water on the input side
- notice the water is not flowing in

see the comments in data.lua around line 40, the furnace just refuses to take in any liquid if there's a pipe connection at the production_type input side that is input-output, extra input & output pipe connections do not cause this issue.

the expected behavior is that you can have input-output flow directions on the input side of a fluid using furnace.

in the meantime i might just have to make the liquid flow through other compound entities in order to split the flow, but it would be nice if this just worked.

edit 1: applies to assembling machines too, and only when there's an "input" and an "input-output" present, if both are "input-output" it does work as expected, still there should probably be either a bugfix or data stage assertion for this situation.

[raiguard]

Thanks for the report, this has been fixed for 2.0.56.