Inlining handles tuple inputs incorrectly

[Per Östlund]

Flattening the following model with -g=MetaModelica:

function f
  input tuple<Real, Real> y;
  output Real z;
algorithm
  (z, _) := y;
  annotation(__OpenModelica_EarlyInline=true);
end f;

model M
  Real x;
algorithm
  x := f((time, time));
end M;

gives

class M
  Real x;
algorithm
  x := Tuple(#(time), #(time));
end M;

I.e. the inlining replaces the call with the whole input tuple, instead of the first tuple element as expected.