in_addr_t is not defined on SunOS4...

[Alexandre Oliva]

... and inet_addr was assumed to return such a type.  I've hacked it
to explicitly use the return type of inet_addr (__typeof) to
initialize laddr, because I'm not sure in_addr_t is supposed to be
defined in sys/types.h on all platforms in which it would be useful.
Does anybody have an authoritative information?

Here's the patch.  Installed in branch and mainline.  (SunOS4 is
almost getting there!)