vchoi_fork

[svn-r4668] 
Purpose:
    Eliminated warnings
Description:
    On IRIX and Windows 98, if a function, that returns a value, throws
    an exception in "else" statement, the compiler still complains that
    the function doesn't return a value.
Solution:
    Replaced:
	if (something valid)
	    return a value
	else
	    throw an exception

    with:
	if (something invalid)
	    throw an exception
	return a value
Platforms tested:
    Windows 98
    SunOS 5.7 (arabica)
    Linux 6.2 (eirene)
    IRIX64 (modi4) - only tested that the warnings went away, still working
			on other configuration problems.