Glass Mask theatre, DublinSimon Stephens's update of Franz Kroetz's stark 1972 play sees butcher Charlie and welder Victor amid knives and flanks of meat, the threat of violence palpable In the tiny Glass Mask cafe-theatre, Charlie (Lauren Farrell) tosses strips of raw offal into a bucket. A butcher who loves her job, Charlie is entertaining a potential boyfriend, the brash welder, Victor (Rex Ryan) in her white-tile…