message: clean up withPreparedECSqlStatement
diff: @@ -172,15 +172,14 @@ export class IModelDb extends IModel {
  */
  public withPreparedECSqlStatement<T>(ecsql: string, cb: (stmt: ECSqlStatement) => T): T {
  const stmt = this.getPreparedECSqlStatement(ecsql);
  - let val: T;
  try {
  - val = cb(stmt);
  + const val: T = cb(stmt);
  + this.releasePreparedECSqlStatement(stmt);
  + return val;
  } catch (err) {
  this.releasePreparedECSqlStatement(stmt);
  throw err;
  }
  - this.releasePreparedECSqlStatement(stmt);
  - return val;
  }
  /** Execute a query against this iModel (overridden to improve performance)
  