Relax the detection of the last dive.
Relax the detection of the last dive.

We received data from a Mares Smart where the existing heuristics to
detect the last dive are not sufficient. The very last check, where the
calculated and stored are compared results in a fatal error.

glance-/libdivecomputer,Poltsi/libdivecomputer-vms,henrik242/libdivecomputer,glance-/libdivecomputer,henrik242/libdivecomputer