libavformat: Handle error return from ff_listen_bind

Handle error return from ff_listen_bind without leaking file descriptors.
Signed-off-by: Anders Nystrom <anders.nystrom@southpole.se>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

libavformat/tcp.c

@@ -114,11 +114,11 @@ static int tcp_open(URLContext *h, const char *uri, int flags)
     }
 
     if (s->listen) {
-        if ((fd = ff_listen_bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
+        if ((ret = ff_listen_bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
                                   s->listen_timeout, h)) < 0) {
-            ret = fd;
             goto fail1;
         }
+        fd = ret;
     } else {
         if ((ret = ff_listen_connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
                                      s->timeout, h, !!cur_ai->ai_next)) < 0) {

libavformat/unix.c

@@ -75,12 +75,11 @@ static int unix_open(URLContext *h, const char *filename, int flags)
         return ff_neterrno();
 
     if (s->listen) {
-        fd = ff_listen_bind(fd, (struct sockaddr *)&s->addr,
+        ret = ff_listen_bind(fd, (struct sockaddr *)&s->addr,
                              sizeof(s->addr), s->timeout, h);
-        if (fd < 0) {
-            ret = fd;
+        if (ret < 0)
             goto fail;
-        }
+        fd = ret;
     } else {
         ret = ff_listen_connect(fd, (struct sockaddr *)&s->addr,
                                 sizeof(s->addr), s->timeout, h, 0);