NELLIE PEYTON and NGOUDA DIONE WHEN Senegal erupted in violent protests this month over perceived injustice and inequality, artist Omar Ba was tackling the issues in his own way, with paint on canvas. "What the youth are doing in the streets is the same thing I'm doing in my studio," said Ba, stepping in black paint and making footprints on a new canvas in his airy workspace outside the capital, Dakar. Ba, one of Senegal's best-known contemporary artists, has often used his art to make political statements. A current exhibit at the Galerie Templon in Brussels, 'Anomalies', critiques power-hungry leaders…