on touch device clicking on molart bar causes JS error

Uncaught TypeError: Cannot read property 'touches' of undefined
    at HTMLDocument.self._touchStartEvent (minerva.js.xhtml?ln=js&m_version=5dfe339a739686487e3a53d9338b1839c373d365:230139)
    at HTMLDocument.dispatch (jquery.js.xhtml?ln=primefaces&m_version=5dfe339a739686487e3a53d9338b1839c373d365:25)
    at HTMLDocument.cc.handle (jquery.js.xhtml?ln=primefaces&m_version=5dfe339a739686487e3a53d9338b1839c373d365:25)
    at Object.trigger (jquery.js.xhtml?ln=primefaces&m_version=5dfe339a739686487e3a53d9338b1839c373d365:25)
    at HTMLDivElement.<anonymous> (jquery.js.xhtml?ln=primefaces&m_version=5dfe339a739686487e3a53d9338b1839c373d365:25)
    at Function.each (jquery.js.xhtml?ln=primefaces&m_version=5dfe339a739686487e3a53d9338b1839c373d365:14)
    at init.each (jquery.js.xhtml?ln=primefaces&m_version=5dfe339a739686487e3a53d9338b1839c373d365:14)
    at init.trigger (jquery.js.xhtml?ln=primefaces&m_version=5dfe339a739686487e3a53d9338b1839c373d365:25)
    at HTMLDivElement.<anonymous> (minerva.js.xhtml?ln=js&m_version=5dfe339a739686487e3a53d9338b1839c373d365:66640)
    at HTMLDivElement.dispatch (jquery.js.xhtml?ln=primefaces&m_version=5dfe339a739686487e3a53d9338b1839c373d365:25)
    at HTMLDivElement.cc.handle (jquery.js.xhtml?ln=primefaces&m_version=5dfe339a739686487e3a53d9338b1839c373d365:25)

reported by @david.hoksza