Add missing initialisation of the "Bar Option" check box, leading to keeping the check box checked when switching from an histogram draw with "BAR" option to another one without that option. Thanks to Axel for reporting this.


git-svn-id: https://root.cern.ch/svn/root/branches/v5-34-00-patches@49085 27541ba8-7e3a-0410-8455-c3a389f83636