fix variable name, add int

Author: vladak

network.tex

@@ -1128,15 +1128,15 @@
 hi.ai\_socktype = SOCK\_STREAM; hi.ai\_flags = AI\_PASSIVE;
 \emprg{getaddrinfo}(NULL, portstr, &hi, &rorig);
 for (r = rorig; r != NULL; r = r->ai\_next) \{
-    fd = \emprg{socket}(r->ai\_family, r->ai\_socktype,
+    int fd = \emprg{socket}(r->ai\_family, r->ai\_socktype,
         r->ai\_protocol);
     if (!\emprg{bind}(fd, r->ai\_addr, r->ai\_addrlen)) break;
 \}
 \emprg{freeaddrinfo}(rorig); \emprg{listen}(fd, nclients);
 for (;;) \{ sz = sizeof(ca);
-    nfd = \emprg{accept}(fd, (struct sockaddr *)&ca, &sz);
+    int nfd = \emprg{accept}(fd, (struct sockaddr *)&ca, &sz);
     /* communication with the client */
-    close(newsock);
+    close(nfd);
 \}
 \end{alltt}
 \end{slide}