Tank Graph broken?

[Davide DB]

I think I understood what happened.

I deleted a tank from the equipment tab and gaschange event were not
updated with new cylinder number.

Looking at my other dives, cylinder numbers are zero based but my dive has:

 <cylinder size='17.0 l' workpressure='232.0 bar' description='D8.5
232 bar' o2='16.0%' he='60.0%' start='230.0 bar' end='160.0 bar' />
  <cylinder size='5.547 l' workpressure='206.843 bar'
description='AL40' o2='100.0%' start='200.0 bar' end='170.0 bar' />
  <cylinder size='7.0 l' workpressure='200.0 bar' description='ALU7'
o2='50.0%' he='20.0%' start='200.0 bar' end='160.0 bar' />

And gaschange events are:

<event time='67:00 min' type='11' value='50' name='gaschange'
cylinder='3' o2='50.0%' />
<event time='111:29 min' type='11' value='100' name='gaschange'
cylinder='2' o2='100.0%' />