Fixed a bug in writing the RNG state and now only loads it if it is present.
Fixed a bug in writing the RNG state and now only loads it if it is present.

adamallo/beast-mcmc,4ment/beast-mcmc,beast-dev/beast-mcmc,adamallo/beast-mcmc,adamallo/beast-mcmc,beast-dev/beast-mcmc,beast-dev/beast-mcmc,codeaudit/beast-mcmc,adamallo/beast-mcmc,4ment/beast-mcmc,beast-dev/beast-mcmc,4ment/beast-mcmc,codeaudit/beast-mcmc,maxbiostat/beast-mcmc,codeaudit/beast-mcmc,codeaudit/beast-mcmc,maxbiostat/beast-mcmc,beast-dev/beast-mcmc,maxbiostat/beast-mcmc,beast-dev/beast-mcmc,maxbiostat/beast-mcmc,maxbiostat/beast-mcmc,codeaudit/beast-mcmc,4ment/beast-mcmc,4ment/beast-mcmc,codeaudit/beast-mcmc,4ment/beast-mcmc,maxbiostat/beast-mcmc,adamallo/beast-mcmc,adamallo/beast-mcmc