The fate of two of Houston's larger radio stations, KLOL-FM and KHMX-FM, have been up in the air for a while.Clear Channel has said it planned to get rid of the two stations, but no one was sure who'd get them.It turns out one huge radio outfit has been traded for another.CBS Radio, which has 140 stations in the top 50 markets in the country, has swapped five smallish stations for Clear Channel's two bigger ones. (No players to be named later, no draft picks.)