MAHAMAT RAMADANE TIMOTHE Sidjim left the morgue with reddened eyes and a haggard look. He had just identified the body of his 22-year-old son, Allasem, one of at least 50 people killed in the violence that erupted as people protested against Chad's government. Hundreds took to the streets of the capital N'Djamena and other cities to demand a quicker transition to democratic rule just weeks after a military junta announced it was extending its time in power by two years. Police reacted by firing live rounds on protestors, rights groups, including Amnesty International, said. Around 300 people were wounded, the government said.…