Fix some of the problems that bde pointed out to me some time ago.  - buffer expansions were not working right due to a return code botch.  - signed types instead of size_t's meant somebody else went and put    casts in, I've changed the types to what they should have been.
Fix some of the problems that bde pointed out to me some time ago.
 - buffer expansions were not working right due to a return code botch.
 - signed types instead of size_t's meant somebody else went and put
   casts in, I've changed the types to what they should have been.

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