[PATCH 08/22] sandbox: Add work-around for SDL2 display

[Simon Glass]

At present the display does not show on some machines, e.g. Ubunutu
20.04 but the reason is unknown. Add a work-around until this can be
determined.

Also include more error checking just in case.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 arch/sandbox/cpu/sdl.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

Applied to u-boot-dm, thanks!