[PATCH vkd3d v2 02/10] vkd3d-shader/hlsl: Move the common shape computation to expr_common_shape.

[Matteo Bruni]

Signed-off-by: Matteo Bruni <mbruni at codeweavers.com>
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FWIW I don't necessarily see introducing a struct for the 3 out
parameters all that bad, but this also works for me.