MIKE HYDRO hotfix 18-04-2018

This MIKE HYDRO Basin hotfix fixes the auto-calibration process for a NAM simulation, when the use of the CK2 NAM parameter is unchecked, in which case its value is used but not calibrated. The correct behaviour is that the value of CK2 is locked to the value of CK1, which is optimized by the auto-calibration process. The hotfix corrects this issue.