private Character decodeCharacter(byte[] b) {
    return Character.valueOf((char) decodeInteger(b).intValue());
  }
Handles old whalin (tested with v1.6) encoding: data type is in the first
byte of the value.

@author bpartensky
@since Oct 16, 2008
src/main/java/net/spy/memcached/transcoders/WhalinV1Transcoder.java