Fix SSTU engine cluster masses

[MikeOnTea]

SSTU's engine clusters calculate their masses wrong. For example, if you change from one engine to two, the mass triples instead of doubles iirc. Fix this by setting adjustMass to false, which i think was made for realfuels compatibility.

[stratochief66]

RealFuels is a requirement for RO though.

[MikeOnTea]

Sure - i was trying to say "if that switch was made for us and it works, we probably should start using it".

[Bornholio]

diameter change worked okay, whatever is messed up in my install didn't seem like the =false gave a reasonable result, not sure if it was RF interaction. @blowfishpro do you have any insight? I know you contribute to SSTU

[blowfishpro]

I don’t really know much about this area unfortunately

[MikeOnTea]

adjustMass = false disables SSTU's engine cluster mass calculations, because apparently RealFuels has its own calculation, and they don't play nice along each other. SSTU passes the number of engines in a cluster to RF, so RF can and does calculate the correct engine cluster mass just fine on its own.

Also, apparently the patch works for Bornholio as he mentioned on IRC, he just doesn't trust his SSTU installation.

[Bornholio]

tested a bit more and mike is right, seems to be appropriate

[raidernick]

So is this ready to merge or not I want to release the new RO and I'll leave this out if no responses?