#504 ifp_ifaddr does not find the first set address

[Darren]

on solaris it is possible to have multiple IP addresses associated with a network itnerface and it is possible for the first one (logical interface :0) to be all 0's and for all of the active IP addresses are at logical interfaces 1 and above. when the system is thus configured, ifp_ifaddr() returns 0 rather than finding the first non-zero address.