socket-proxyd: do not hardcode -1 in a check for fd validity

diff --git a/src/socket-proxy/socket-proxyd.c b/src/socket-proxy/socket-proxyd.c
index 2a6eeb661a67768de30c39e79b84bd6a10a35ddf..fb262842d88f5ef26f8ed1f8b9209700d81cf595 100644 (file)
--- a/src/socket-proxy/socket-proxyd.c
+++ b/src/socket-proxy/socket-proxyd.c
@@ -234,15 +234,15 @@ static int traffic_cb(sd_event_source *s, int fd, uint32_t revents, void *userda
                 goto quit;
 
         /* EOF on both sides? */
-        if (c->server_fd == -1 && c->client_fd == -1)
+        if (c->server_fd < 0 && c->client_fd < 0)
                 goto quit;
 
         /* Server closed, and all data written to client? */
-        if (c->server_fd == -1 && c->server_to_client_buffer_full <= 0)
+        if (c->server_fd < 0 && c->server_to_client_buffer_full <= 0)
                 goto quit;
 
         /* Client closed, and all data written to server? */
-        if (c->client_fd == -1 && c->client_to_server_buffer_full <= 0)
+        if (c->client_fd < 0 && c->client_to_server_buffer_full <= 0)
                 goto quit;
 
         r = connection_enable_event_sources(c);