Farmers at Fresno State have answered every child?s wish: They grow a vegetable that tastes like candy.Sweet, buttery, crunchy. Every day the university sells 10,000 to 30,000 ears of super-sugary corn grown on its campus farm smack in the middle of this Central Valley city. People line up for it at the university?s Gibson Farm Store, helping to make it one of the most profitable student markets in the nation. The farm earned $4.5 million in the fiscal year just ended, twice as much as the University of Wisconsin-Madison.