virtio-gpu: Correct virgl_renderer_resource_get_info() error check

virtio-gpu: Correct virgl_renderer_resource_get_info() error check

virgl_renderer_resource_get_info() returns errno and not -1 on error.
Correct the return-value check.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Message-Id: <20240129073921.446869-1-dmitry.osipenko@collabora.com>
Cc: qemu-stable@nongnu.org
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 574b64aa6754ba491f51024c5a823a674d48a658)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>