SPRINGFIELD — A former state lawmaker is suing the state comptroller for salary increases he claims he was entitled to while serving in the Illinois General Assembly for 12 years, even though he voted against those raises as a lawmaker.Former Rep. Mike Fortner joins two other former state senators in filing separate lawsuits against Illinois Comptroller Susana Mendoza over pay raises that they argue are mandated by the state constitution.Fortner served in the Illinois General Assembly from January 2007 to January 2019 as a …