Fix reported position when no token can be parsed
Fix reported position when no token can be parsed

Finally fix https://github.com/sass/libsass/pull/979

panicinc/libsass,FishingCactus/libsass,am11/libsass,panicinc/libsass,mikebarkas/libsass,panicinc/libsass,mtwebster/mint-libsass,technoAri/libsass,TBAPI-0KA/NSass,mtwebster/mint-libsass,technoAri/libsass,technoAri/libsass,am11/libsass,am11/libsass,panicinc/libsass,TBAPI-0KA/NSass,FishingCactus/libsass,mtwebster/mint-libsass,FishingCactus/libsass,TBAPI-0KA/NSass,saper/libsass,khchanel/libsass,mikebarkas/libsass,saper/libsass,errorx666/libsass,am11/libsass,saper/libsass,mikebarkas/libsass,khchanel/libsass,technoAri/libsass,technoAri/libsass,TBAPI-0KA/NSass,FishingCactus/libsass,TBAPI-0KA/NSass,mikebarkas/libsass,panicinc/libsass,khchanel/libsass,am11/libsass,khchanel/libsass,mtwebster/mint-libsass,mtwebster/mint-libsass,errorx666/libsass,mikebarkas/libsass,errorx666/libsass,saper/libsass,saper/libsass,FishingCactus/libsass,TBAPI-0KA/NSass,errorx666/libsass,khchanel/libsass