Dump mode patch, and results

[Ross Burton]

Hi,

Attached is a patch I needed on my ARM device, where running it in dump
mode would crash when outputting.  The problem is that the output
methods call curses methods (wrefresh in particular) when in dump mode,
even though the window pointer is null.  This causes crashes on my ARM.

In other news, thanks to powertop I've managed to get this ARM pda down
to 4.4 wakeups a second when idle.

Ross
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