MARSEILLE, France (Reuters) - The southern French city of Marseille called off a three-week hunt for a black panther on Tuesday after the animal sighted by several residents turned out to be a large house cat. "The 'panther' is just a black house cat -- a very big one though," said a spokeswoman for the local prefecture, adding the animal was about 24 inches long and weighed some 22 pounds. Police deployed dozens of searchers this month after reports that a blank panther was roaming around the nearby Calanques area, popular with tourists for its creeks, rocks and beaches. Searchers...