Silence foreach() error when no PPP interfaces exist
Silence foreach() error when no PPP interfaces exist

ptorsten/pfsense,brunostein/pfsense,pfsense/pfsense,ptorsten/pfsense,phil-davis/pfsense,dennypage/pfsense,phil-davis/pfsense,NewEraCracker/pfsense,NewEraCracker/pfsense,dennypage/pfsense,brunostein/pfsense,NewEraCracker/pfsense,NOYB/pfsense,NOYB/pfsense,brunostein/pfsense,jxmx/pfsense,NOYB/pfsense,ch1c4um/pfsense,jxmx/pfsense,jxmx/pfsense,BlackstarGroup/pfsense,ch1c4um/pfsense,NewEraCracker/pfsense,BlackstarGroup/pfsense,phil-davis/pfsense,BlackstarGroup/pfsense,ch1c4um/pfsense,ch1c4um/pfsense,phil-davis/pfsense,pfsense/pfsense,pfsense/pfsense,BlackstarGroup/pfsense,ptorsten/pfsense,pfsense/pfsense,dennypage/pfsense,dennypage/pfsense