(Olympia, WA)  --  A bill that's intended to keep charter schools operating in Washington is headed for the governor's desk.  Under the bill that was given final legislative approval yesterday, lottery revenue would be used to fund charter schools, and that revenue would be replaced by general-fund money.  Supporters say the measure offers a "fix" that abides by a state Supreme Court ruling that charter schools can't be funded by money from the state's general fund.  Opponents say the bill, if it's signed, won't withstand challenges in court.