Fix field number computation
Fix field number computation

mlichvar/augeas,manandbytes/augeas,ptoscano/augeas,bkearney/augeas,camptocamp/augeas,dafugg/augeas,kumy/augeas,dafugg/augeas,hercules-team/augeas-do-not-use,pevalme/augeas,kumy/augeas,mchf/augeas,lutter/augeas,mchf/augeas,mlichvar/augeas,pevalme/augeas,domcleal/augeas,bkearney/augeas,bkearney/augeas,MikaelSmith/augeas,jasperla/augeas,kunkku/augeas,lutter/augeas,hercules-team/augeas,raphink/augeas,kunkku/augeas,kunkku/augeas,mlichvar/augeas,jjlin/augeas,manandbytes/augeas,kumy/augeas,lutter/augeas,ptoscano/augeas,camptocamp/augeas,domcleal/augeas,jtopjian/augeas,dafugg/augeas,kumy/augeas,jjlin/augeas,MikaelSmith/augeas,jtopjian/augeas,camptocamp/augeas,raphink/augeas,hercules-team/augeas-do-not-use,GeoffWilliams/augeas,pevalme/augeas,domcleal/augeas,bkearney/augeas,jasperla/augeas,camptocamp/augeas,hercules-team/augeas-do-not-use,jjlin/augeas,ptoscano/augeas,GeoffWilliams/augeas,hercules-team/augeas