BRUSSELS — “Young@Heart,” by British smallscreen helmer Stephen Walker, has won the public prize at the Ghent Film Festival, which wrapped Saturday.Docu follows the exploits of a choir of seniors from Northampton, Mass., as they prepare material for a new show, including Sonic Youth and James Brown covers. All films appearing in the fest were eligible for the prize, announced Monday. Coin goes to local distributor ABC Distribution. A second public prize went to “Hunger,” Steve McQueen’s harrowing account of the 1980s hunger strike in Northern Ireland’s Maze Prison. Pic will now be screened by local pubcaster VRT-Canvas.