Marketplace: Steve Chiotakis: If you think you’re dealing with a long, hot summer, try this number on for size: "57." That’s how many days the temperature’s climbed above 100 degrees in San Antonio, Texas, this year. And that record-breaking heatwave is cooking up some high-energy bills. From Texas Public Radio, David Martin Davies reports. David Martin Davies: In Texas, the summer of 2009 will be remembered for high temperatures and high-power bills. RANDY CHAPMAN: We’re seeing record …