tree 2c571142f1fbe400a24f6a77e8e86618d465272e
parent efdeb96c5a1179ee3fde3a0d77fb19f92e5849e5
author Prasad J Pandit <pjp@fedoraproject.org> 1449149057 +0530
committer Peter Maydell <peter.maydell@linaro.org> 1449149690 +0000

ui: vnc: avoid floating point exception

While sending 'SetPixelFormat' messages to a VNC server,
the client could set the 'red-max', 'green-max' and 'blue-max'
values to be zero. This leads to a floating point exception in
write_png_palette while doing frame buffer updates.

Reported-by: Lian Yihan <lianyihan@360.cn>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>