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  CLASS: SmallByteArray     --DVM
  PUBLIC METHODS:
   SmallByteArray(l)    - Constructor: l bytes long
   SmallByteArray(bp,l) - Constructor: copy from bp, l bytes
    length()              - returns length
    error()               - returns error
    operatorXX()          - cast to BYTE_PTR , CONST_BYTE_PTR , String
    operator=()           - assign from string or sba
    setLen()              - dynamically set length
    clear()               - sets len to zero, deallocates
    toMem()               - copies to mem
    fromMem()             - copies from mem
 
  USAGE NOTES:
   This is provided for use inside of descriptors. Most users will
   use ByteArray instead.
  
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