Fix error checking of debug statements in configuration file.
Fix error checking of debug statements in configuration file.

boutier/babeld,jech/babeld,Gwendocg/babeldToS,wlanslovenija/babeld,wlanslovenija/babeld,sudomesh/babeld,Gwendocg/babeldToS,woniullb/babeld,dtaht/babeld-shortrtt-metrics,Drooids/babeld,jech/babeld,tcatm/babeld