Disable Double buffering for embedded application

[Vasant Kanchan <v_kanchan yahoo com>]

Hello,

I am considering gtk for embedded use and was trying to see if disabling 
double bufferring
would speed up performance. So I commented USE_BACKING_STORE in 
gdkwindow.c.
My understanding was that with this change all drawing will directly be 
done to the screen.
However gtktest() showed some funny problems. Some widgets don't  get 
drawn sometimes and the behaviour  is random. This is on the latest 
gtk+-2.4.11 on slackware 10.

Any ideas, comments.

Regards
Kanchan