Minor fix for DEBUG compilation
Minor fix for DEBUG compilation

cr-marcstevens/fplll,fplll/fplll,dstehle/fplll,shi-bai/fplll,fplll/fplll,dstehle/fplll,fplll/fplll,cr-marcstevens/fplll,gbonnoron/fplll,GottfriedHerold/fplll,blowfish880/fplll,GottfriedHerold/fplll,cr-marcstevens/fplll,shi-bai/fplll,gbonnoron/fplll,fplll/fplll,blowfish880/fplll,shi-bai/fplll,shi-bai/fplll,GottfriedHerold/fplll,blowfish880/fplll,gbonnoron/fplll,fplll/fplll,cr-marcstevens/fplll,dstehle/fplll