examples: warzone2100: 64-bit: add v2.3.8 adaption support

There are differences between game versions which can't be adapted
automatically. We need to distinguish versions. In older versions
of the game like 2.3.8 objects are allocated with malloc() and in
new versions like 3.1.0 objects are allocated with _Znwm().

With unified adaption code this is much easier, now.