[0.12.0] Crash: old laser turrents in pattern

[Gemoron]

I just discovered the following reproducable bug:

requirement: I have a blueprint for my rail network that also has several turrents for defense in it. they were arranged in the old 1x1 size pattern, not the new 2x2 size.

The blueprint is in my quickbar.
I try to pick it up to be able to place it
-> the game crashes

I think the bug appears because of the changed size of turrents in patterns. and that it will only appear in old maps as it is impossible to produce new blueprint with the faulty turrent placements.

I think a conversion rule that changes the patterns would help here.

Have fun fixing.

[Rseding91]

This is related to underground belts in blueprints and rotating the blueprint. It's fixed for 0.12.1