minor comment change for clarity
changed mat_t to th_params_t
fixed problem in which an unhandled out of range exception was being thrown in setup. This was occuring because I was trying to access the elements of an empty vector<StrList> generated by a misinformed SQL query to the stc_data.sqlite database. Specifically, the wrong alpha_th value provided no results for the mat_id and gave an empty query result. Accessing the elements of that result, obviously, threw an out of range exception. https://groups.google.com/forum/?fromgroups=#!topic/googletestframework/kcLsZ1w8hP4 .