tests/qtest/vnc-display-test: Use the 'none' machine
If we don't specify any machine, an architecture default
might be picked. But some architectures don't provide any
default, such ARM:
$ make check-qtest-aarch64
...
19/20 qemu:qtest+qtest-aarch64 / qtest-aarch64/vnc-display-test
qemu-system-aarch64: No machine specified, and there is no default
Since we don't need any particular machine to run this VNC
test, use the 'none' machine.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <
20230119120514.28778-3-philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>