git-daemon not listening when compiled with -DNO_IPV6

git-daemon was not listening when compiled with -DNO_IPV6.
socksetup() was not returning socket count when compiled with -DNO_IPV6.
Signed-off-by: NPaul Serice <paul@serice.net>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

daemon.c

@@ -466,8 +466,14 @@ static int socksetup(int port, int **socklist_p)
 		return 0;
 	}
 
+	if (listen(sockfd, 5) < 0) {
+		close(sockfd);
+		return 0;
+	}
+
 	*socklist_p = xmalloc(sizeof(int));
 	**socklist_p = sockfd;
+	return 1;
 }
 
 #endif