* China to contribute $43 billion to IMF crisis war chest. * BRICS to boost funds to IMF, but want reforms. * IMF voting reforms agreed in 2010, but not implemented. China on Monday offered $43 billion to the IMF's crisis-fighting reserves, joining other major emerging markets in pledging new funds to shore up the global financial system while demanding reforms to give the developing world more clout at the IMF. China's contribution, confirmed by a Group of 20 official, follows Russia's pledge of $10 billion and is in line with a promise to supply the International Monetary Fund with extra firepower to help cope with ... (full story)