[Equil] Fix infinite loop in VCS equilibrium solver
[Equil] Fix infinite loop in VCS equilibrium solver

The threshold being removed here was introduced in r714, which was merged into
trunk in r1115.

Fixes Issue 113.


imitrichev/cantera,imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,Heathckliff/cantera,Heathckliff/cantera,Heathckliff/cantera,imitrichev/cantera