MEXICO CITY (Reuters) - Mexican central bank governor Guillermo Ortiz on Wednesday urged the government and food companies to renew price caps for tortillas that have acted as a buffer against inflation. Tortillas, thin corn patties, are a staple of the Mexican diet. After a price rise began fueling inflation toward the end of 2006, the government pressured food producers and retailers to limit prices for corn flour and tortillas. "For consumers, the price containment so far has been a success, and from my point of view it is important that this containment continues," Ortiz told reporters, according to a...