ALLEGRESSE SASSE and NOEL TADEGNON BENIN’S President Patrice Talon cast his vote yesterday in a presidential poll boycotted by some opposition parties due to pre-election violence and because they object to Talon seeking a second term. Talon, a multi-millionaire cotton magnate who touts strong economic growth under his leadership, is accused by his opponents of undermining Benin's standing as one of West Africa's most stable democracies. Protests in several cities this week turned violent. Some people were killed in gunfire on Thursday in the central town of Bante when security forces fired warning shots, its mayor told local radio, without…