An Owasso man is dead as a result of a Wednesday night accident.   The Oklahoma Highway Patrol reports that 29 year-old Brandon JonJock was northbound on Sheridan about 2-tenths of a mile north of 86th St. North in Tulsa County at about 11:20.  His pickup went off the roadway to the right, struck a concrete curb,a nd rolled at least one compete time.  Jonjock was taken to Tulsa's St. John's Hospital where he later died.  The report indicates that inattentive driving is a cause of the accident.