iPcSpawn::AddEntityType() is not usable from Python

[glibersat]

IPcSpawn::AddEntityType() uses variadic paramaters but SWIG, by default, puts a NULL value for this argument list.

This makes this method not usable from Python since you can't pass propclasses to create your entities.

The attached patch fixes this issue by allowing at most 10 propclasses to be passed to the function. This is the most straightforward way to fix it and should be sufficient to cover all usages.

[glibersat]

Fix

[sunshine]

As a more complete solution, I would suggest enhancing the underlying C++ API with an AddEntityType() overload which accepts an array of types as the final argument. Not only does this complement the existing variadic overload, but it is also much more amenable to scripting bindings, and would allow script writers to assign any number of entity types by passing in a script-side native collection.