[0.15.9] Fluid tanks have too many rotations

[kpreid]

I was placing a blueprint containing tanks on top of existing tanks and some of them were unexpectedly red (blocking). I rotated them twice and they were blue (object-already-exists) instead.

It seems that tanks have four orientations, not two, even though it makes no difference to the game except in blueprints. They should have only two so that blueprints don't fail (without shift-click) for an invisible reason.

[Rseding91]

Thanks for the report. I've changed storage tanks so they always build in north or east directions.