NEW YORK — A gunman killed a rival after a fight at a Bronx baby shower — only to be fatally shot with his own gun by one of the victim’s friends, police said Sunday. The two men who wound up dead were inside a party on Webster Avenue and E. 198th Street in Bedford Park when they got into a fight Saturday night, police said. Their fight spilled out onto the street and one of the men, age 24, shot his 28-year-old rival in the face about 11 p.m., cops said. The shot man’s outraged friends then jumped the gunman, authorities said. One of those friends, also 28, managed to get the gunman’s weapon …
