#13 Crash if tablet not present and configuration

[Olivier Samyn]

Here is a small patch that contains some improvements versus the latest svn revision (175).

This patch avoid a crash I had on ubuntu when my table was not connected but defined in the xorg.conf file. (if the setup fails, return an inputinfo without the XI86_CONFIGURED flag set)

This patch also changes the configuration parsing: Previously, whatever option you choose to configure your tablet active area, it is always converted to xTop, yTop, xMax, yMax coordinates, but the original values where kept, leading to errors if the driver tried to parse the options twice.

I just reset all values to the default one, after the conversion to xTop, yTop, xMax, yMax.

[Olivier Samyn]