/* we assume that every valid cylinder has either a working pressure
* or a size; but for good measure let's also accept cylinders with
* a starting or ending pressure*/
- if (cyl->type.workingpressure.mbar || cyl->type.size.mliter || start || end) {
+ if (cyl->type.workingpressure.mbar || cyl->type.size.mliter || cyl->gasmix.o2.permille || start || end) {
/* 0% O2 strangely means air, so 21% - I don't like that at all */
int o2 = cyl->gasmix.o2.permille ? : 209;
if (offset > 0) {