Improper materials input can cause segfault #136
Description
If the number of phases specified in the "materials" json entry is less than the number of phases present in the microstructure, a segmentation fault can occur. The MaterialManager seems to have no problem initialising. It is only when the first iteration is about to be calculated that FANS crashes.
This was discovered under the conditions of 1 phase specified by the json and 2 phases present in the microstructure. See attached the FANS.log and FANS.err files of that attempt.