BSTR caching

[Markus Stockhausen]

> You should not be looking at the internal behavior of native, only at
> the external behavior as observed through test cases.
> 

Hm, 

I know, that 

testcase 
-> windows oleaut 
  -> wine ifs.c IMalloc logging 

is quite strange testing. Sadly this was the only way to explore the
reason for not freeing memory. I admit that the application is buggy in
this case but the intention was to get some more programs running.

Best regards.