Fix the gasmix offset for the Aladin Tec 2G.
Fix the gasmix offset for the Aladin Tec 2G.

josh-wambua/libdivecomputer,henrik242/libdivecomputer,glance-/libdivecomputer,venkateshshukla/libdivecomputer,glance-/libdivecomputer,henrik242/libdivecomputer,Poltsi/libdivecomputer-vms,venkateshshukla/libdivecomputer,josh-wambua/libdivecomputer