Refactor vcs_solve_TP to eliminate goto
Refactor vcs_solve_TP to eliminate goto

This contains just the changes to the flow control to give the same
behavior as the original implementation. Additional refactoring
still to come.

git-svn-id: e76dbe14710aecee1ad27675521492cea2578c83@2962 02a645c2-efd0-11dd-984d-ab748d24aa7e

Cantera/cantera-svn,Cantera/cantera-svn,Cantera/cantera-svn,Cantera/cantera-svn,Cantera/cantera-svn,Cantera/cantera-svn