gio: Use OwnedFd to close the socket on error instead of libc::close()

Author: sdroege

gio/src/socket.rs

@@ -29,7 +29,7 @@ impl Socket {
             if error.is_null() {
                 Ok(from_glib_full(ret))
             } else {
-                libc::close(fd);
+                let _ = OwnedFd::from_raw_fd(fd);
                 Err(from_glib_full(error))
             }
         }