avformat/unix: fix handling of EOF in case of SOCK_STREAM.

When recv() returns 0 in case of SOCK_STREAM type, it means EOF and with
this patch returns value accordingly.
Signed-off-by: Bela Bodecs <bodecsb@vivanet.hu>

libavformat/unix.c

@@ -111,6 +111,8 @@ static int unix_read(URLContext *h, uint8_t *buf, int size)
             return ret;
     }
     ret = recv(s->fd, buf, size, 0);
+    if (!ret && s->type == SOCK_STREAM)
+        return AVERROR_EOF;
     return ret < 0 ? ff_neterrno() : ret;
 }