Fix bug in QRdelete1 in Anderson Acceleration
Fix bug in QRdelete1 in Anderson Acceleration

It seems now everything works well

feltor-dev/feltor,feltor-dev/feltor,mwiesenberger/feltor,feltor-dev/feltor,feltor-dev/feltor,mwiesenberger/feltor,mwiesenberger/feltor,mwiesenberger/feltor