This version of the create plot info is the same as before, with the
difference that it doesn't depends on the gc.
Also fixed a crash.
The Pressure Index, Information and interpolated seems wrong,
I'm getting only zeroes.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>