 Your next chocolate bar will probably be going for a lot more money pretty soon. The cocoa harvest in number two producer Ghana is almost complete, and production is down about 45%. The world's biggest cocoa grower, Ivory Coast, is also seeing a disastrous season. Crops have been hit by bad weather and disease, and the young men who usually work the fields are being lured away to work in illegal gold mines. Result, the wholesale price of chocolate's key ingredient, which has more than doubled since the start of the year,