don't go belly up when passed negative values. masking some situation which should be handled better - in this case the UPGMA trees having zero length branches leading to a bug in the coalecent code.
don't go belly up when passed negative values. masking some situation which should be handled better - in this case the UPGMA trees having zero length branches leading to a bug in the coalecent code.
luminwin/beast-mcmc,luminwin/beast-mcmc,luminwin/beast-mcmc,luminwin/beast-mcmc,luminwin/beast-mcmc