tree ea304adc8e2bbd189e7b8253fc987ca434e146ff
parent 8f8050792fa4040615bcdac2aaae7e81f7122769
author Daniel Lezcano <daniel.lezcano@linaro.org> 1309208357 +0200
committer Daniel Lezcano <daniel.lezcano@linaro.org> 1309208357 +0200

fix segfault when no clock is available

When there is no clock available, we even register the display ops.
The 'enter' callbakc is set but not data is available int the row
private data which leads to a segfaults.

This patch fix this problem by not registering the ops if the pm
subsystem was not correctly initialized.

In the meantime, we have to erase the window when we are switching
from one window to another. We can say it is the "default" display
callback.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reported-by: Milo (Woogyom) Kim <woogyom.kim@gmail.com>