Fix max checkpoint size check

Author: benbjohnson

db.go

@@ -677,10 +677,10 @@ func (db *DB) Sync() (err error) {
 	// If WAL size is greater than min threshold, attempt checkpoint.
 	var checkpoint bool
 	checkpointMode := CheckpointModePassive
-	if newWALSize >= calcWALSize(db.pageSize, db.MinCheckpointPageN) {
-		checkpoint = true
-	} else if db.MaxCheckpointPageN > 0 && newWALSize >= calcWALSize(db.pageSize, db.MaxCheckpointPageN) {
+	if db.MaxCheckpointPageN > 0 && newWALSize >= calcWALSize(db.pageSize, db.MaxCheckpointPageN) {
 		checkpoint, checkpointMode = true, CheckpointModeRestart
+	} else if newWALSize >= calcWALSize(db.pageSize, db.MinCheckpointPageN) {
+		checkpoint = true
 	} else if db.CheckpointInterval > 0 && !info.dbModTime.IsZero() && time.Since(info.dbModTime) > db.CheckpointInterval && newWALSize > calcWALSize(db.pageSize, 1) {
 		checkpoint = true
 	}