TPyDelphiObject.SetAttrO causes memory leak

[pyscripter]

As per title.

See https://en.delphipraxis.net/topic/7112-strange-memory-leak-with-checkbox/ for a description and a test project.

Related:

#360

[pyscripter]

inherited SetAttrO was never called and leaking memory.
Fixed now.

@lmbelo This was serious. Please have a look and make sure it is fixed on your side.

[lmbelo]

inherited SetAttrO was never called and leaking memory. Fixed now.

@lmbelo This was serious. Please have a look and make sure it is fixed on your side.

@pyscripter thanks, I surely will.