vchoi_fork

[svn-r3008] Purpose:
    Code cleanup
Description:
    Several places in the code were using -2 as a default value for various
    features.  However, when a default value is returned from a function that
    is supposed to return negative on failure, it was causing confusion and
    extra work for users to check for the special value.
Solution:
    Replaced hard-coded -2 values in the code with symbolic names, then changed
    symbolic names to 0 instead of -2.
Platforms tested:
    FreeBSD 4.2 (hawkwind)