PythonAddDeclarationsPass ignores ParameterDeclarations and does not resolve symbols to them

[KuechA]

In the following example

def foo(a):
    a = bar(a)
    return a

all three References in the function body have the refersTo set to a VariableDeclaration but they ignore that the symbol is already defined by the ParameterDeclaration.

In contrast., the References refer to the ParameterDeclaration in the case of

def foo(a):
    b = bar(a)
    return a