Two men have been arrested and charged in the fatal stabbing of a fill-in bartender during a robbery at a South Philadelphia bar in the early morning hours of June 24, police said today.Keith Hardy, 57, was taken into custody the day after George Fox, 44, was killed inside the T-Barr, 8th and Jackson Streets, but police did not announce his arrest until today, after a second man wanted in the deadly robbery was captured. According to police, the Homicide Fugitive Squad task force found Omar Wright, 31, on the 1200 block of South Millik Street at 6:30 a.m. and arrested him.