stream.getc() doesn't recognize eof

[Brian White]

> So, because c == char.init and nothing has modified it, the path which 
> calls readBlock will return char.init when EOF is reached.

Ah, thanks!

I must say that this technique worries me somewhat.  "readBlock" is an 
abstract function definable by any derived class and I don't believe 
that "c must remain unchanged where data is not stored" is a defined 
output requirement of that method.

-- Brian