- issue 2956: when stoichiometry is nan reset it to 1.
- issue 2956: when stoichiometry is nan reset it to 1.

copasi/COPASI,copasi/COPASI,copasi/COPASI,copasi/COPASI,copasi/COPASI,copasi/COPASI,copasi/COPASI,copasi/COPASI,copasi/COPASI