RIO DE JANEIRO Brazilians are battling the bulge.A government study says the South American country known for its bikinis is expanding at the waistline.The Health Ministry notes that in 2009, 46.6 percent of Brazil's 190 million people were overweight.That's up from 42.7 percent in 2006.The rate of obesity also rose, from 11.4 percent in 2006 to 13.9 percent in 2009.The study released Monday is