Support partial function evaluation

[Jens Frenkel]

The model Modelica.Math.Nonlinear.Examples.quadratureLobatto3 of the MSL3.2.1 failes because code generation does not handle constant funktion arguments.

The function call

Modelica.Math.Nonlinear.quadratureLobatto(function Modelica.Math.Nonlinear.Examples.UtilityFunctions.fun7(A, ws), 0.0, 1.0, 1e-13)

result in the unkown c code arguments

modelica_real _Modelica.Math.Nonlinear.Examples.UtilityFunctions.fun7_A
modelica_real _Modelica.Math.Nonlinear.Examples.UtilityFunctions.fun7_w

for the function

ModelicaMathNonlinearquadratureLobattoModelicaMathNonlinearExamplesUtilityFunctionsfun7

[Adrian Pop]

Hm, these look like partially evaluated functions.
I don't know if we fully support these.
I'll have a look.

[Martin Sjölund]

My local changes now handles this, by introducing closures instead of re-writing the functions in PartFn.mo. Function pointers are now passed as tuple<function,closure>, where a NULL closure calls the function directly. And a non-NULL closure calls an intermediate function that calls the function with the variables bound.

[Martin Sjölund]

Fixed in r21304.