Codecheck: 'const' for a literal parameter ... does not catch all instances

[GunChleoc]

In this function:

    void foo(const int bar,
                    const int baz,
                    const RGBColor& blah)

I will get the following codecheck error:

'const' for a literal parameter is an implementation detail. Remove the const from the interface definition.

However, with this function:

    void foo(const int bar, const int baz, const RGBColor& blah)

no error is triggered.

[GunChleoc (gunchleoc)]

Migrated to https://github.com/widelands/widelands/issues/1622