SLIP sliplogin.c bugfix

[Rayan Zachariassen]

If sliplogin.c worked for you, it was purely by chance.  Here is a way of
making it slightly more deterministic.  Don't blame me, this isn't my code:

*** RCS/sliplogin.c,v	Wed Dec 14 04:24:42 1988
--- sliplogin.c	Wed Dec 14 04:36:40 1988
***************
*** 218,223 ****
--- 218,224 ----
  	int val;
  	extern struct in_addr inet_makeaddr();

+ 	bzero((caddr_t)saddr, sizeof *saddr);
  	sin->sin_family = AF_INET;
  	val = inet_addr(s);
  	if (val != -1) {

[[ This fix has been applied to the copy in the archives.  --wnl ]]