Fix a nasty bug which would leave the struct hostent incompletely filled out

when parsing certain DNS records during a reverse address resolution. Thus
when code tries to examine the returned host name, it dereferences a null
pointer :-(

Problem noticed by:	ps

lib/libc/net/name6.c

@@ -1185,7 +1185,7 @@ getanswer(answer, anslen, qname, qtype, template, errp)
 				continue;
 			}
 			strcpy(bp, tbuf);
-			tname = bp;
+			template->h_name = bp;
 			bp += n;
 			buflen -= n;
 			continue;