Pre-compute coordinates for each line of text.
Pre-compute coordinates for each line of text.

The values don't change, so there's no reason to repeat those
calculations on every redraw.  The resulting code is not just faster,
but also smaller and simpler, and we no longer need to store halign in
the text info object.

mlitwiniuk/flot,chaveiro/flot,soenter/flot,stanislavdavid/flot,MAMISHO/flot,TrainingPeaks/flot,k-joseph/flot,cipix2000/flot,cipix2000/engineering-flot,saike/flot,chiu/flot,saike/flot,resnick1223/flot,matong/flot,chaveiro/flot,sedran/flot,mlitwiniuk/flot,andig/flot,cipix2000/flot,mlitwiniuk/flot,fashionsun/flot,magora-suchkov/flot,k-joseph/flot,resnick1223/flot,k-joseph/flot,klarkc/flot,lolifans/flot,soenter/flot,mcanthony/flot,octavianCraciun/engineering-flot,colinhunt/flot,chaveiro/flot,stanislavdavid/flot,chiu/flot,ni-kismet/engineering-flot,stanislavdavid/flot,trask/flot,kongx73/flot,chiu/flot,Sensirion/flot,pepperdata/flot,andig/flot,flot/flot,resnick1223/flot,andig/flot,petrvacha/flot,saike/flot,gdseller/flot