Re: msi(1/3): Don't crash if rec is NULL

[Juan Lang]

> The public APIs check for bad records and return ERROR_INVALID_HANDLE,
> so they will never send in a NULL rec.  Something internally is
> sending in a NULL rec, and that needs to be fixed.

On the contrary, the record is not NULL, it has 0 parameters.

I've resent in the fix with a test showing it's correct.
--Juan