util/vhost-user-server: Clean up local variable shadowing

util/vhost-user-server: Clean up local variable shadowing

Fix:

  util/vhost-user-server.c: In function ‘set_watch’:
  util/vhost-user-server.c:274:20: warning: declaration of ‘vu_fd_watch’ shadows a previous local [-Wshadow=compatible-local]
    274 |         VuFdWatch *vu_fd_watch = g_new0(VuFdWatch, 1);
        |                    ^~~~~~~~~~~
  util/vhost-user-server.c:271:16: note: shadowed declaration is here
    271 |     VuFdWatch *vu_fd_watch = find_vu_fd_watch(server, fd);
        |                ^~~~~~~~~~~

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904161235.84651-18-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>