Phase Transitions don't work when one of the Phases==0

[boriskaus]

Phase Transitions don't work if the involved phases have phase==0.
This can be reproduced with t16_PhaseTransitions/Plume_PhaseTransitions.dat by making the air phase 3 instead of 0, and the mantle phase 0 instead of 3.

This results in:

whereas it should look like:

A test file is here: [Plume_PhaseTransitions_SwappedPhases.dat.zip]
(https://github.com/UniMainzGeo/LaMEM/files/14157744/Plume_PhaseTransitions_SwappedPhases.dat.zip)

[boriskaus]

this has been fixed upstream in LaMEM and should become available in the next release of LaMEM