[current tinderbox] failure on ...all...

[Joseph Koshy]

> The warning is correct.  Two identical types with different
> not the same type unless one is a direct or indirect typedef 
> for the other.

You are right.  I was under the impression that the
C type system based on structural equivalence.

> It also seems strange to me that you on the one hand 
> introduce a new struct to separate MD and MI interfaces, 
> and on the other hand continue to assume that they are 
> assignment-compatible.  

I'd be very surprised if two C structures with identical 
definitions were not assignment compatible.  The code in 
question would have changed (to something like what it is now) 
had the MD struct changed in the future.

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