remove incorrect and useless check in network service name lookup code

the condition was probably intended to be !*p rather than !p, but
neither is needed here. the subsequent code naturally handles the case
where it's already at end of string.

src/network/lookup_serv.c

@@ -52,7 +52,6 @@ int __lookup_serv(struct service buf[static MAXSERVS], const char *name, int pro
 
 		/* Skip past canonical name at beginning of line */
 		for (p=line; *p && !isspace(*p); p++);
-		if (!p) continue;
 
 		port = strtoul(p, &z, 10);
 		if (port > 65535 || z==p) continue;