Wrong equation count with Complex - New case

[massimo ceraolo]

This is similar but different from #4606
I hope the solution is as straightforward as it was in that case!
Consider the following code:

package NumEqBug
  model TestLineZb
    parameter Real y[:] = {8, 10} ;
    Complex Z[2, 2];
  equation
      Z =LineZb(
        y=y );
  end TestLineZb;
  function LineZb
    import Modelica.ComplexMath;
    input Real y[2];
    output Complex Z[2, 2];
  algorithm
    Z:=fill(Complex(1,1),2,2);
  end LineZb;
end NumEqBug;

Checking TestLineZb I get 4 equations and 8 variables. I would expect 8 equations and 8 variables.