Code generation for reductions is wrong

[Martin Sjölund]

{{{function f

input Integer i1;
output Integer i := max(j for j in {1,2,3,i1});

end f;}}}

Generates the following code, which does not work because it casts things to real that are integer. And it uses max(A,B), which is not defined (use std::max or even better, defined openmodelica_max):
{{{ modelica_integer tmp3;

...

tmp3 = max((modelica_real)(tmp3), (modelica_real)((modelica_integer)_j));}}}

[Martin Sjölund]

Fixed with the new codegen for reductions