Fix problem reported on http://forum.pfsense.org/index.php/topic,10984.0.html.
Fix problem reported on http://forum.pfsense.org/index.php/topic,10984.0.html.

Actually this is a dumb php susbstr() function behaviour since the code logic was fine.
Either way this fixes the problem of not allowing more the 12 total interfaces present.

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