rtsp: use CLOSE_SOCKET() instead of close()

Use CLOSE_SOCKET instead of directly calling close() because it does the right
thing for windows.

Fixes #597539

gst-libs/gst/rtsp/gstrtspconnection.c

@@ -446,7 +446,7 @@ accept_failed:
 getnameinfo_failed:
 wrong_family:
   {
-    close (fd);
+    CLOSE_SOCKET (fd);
     return GST_RTSP_ERROR;
   }
 }