Fixing infinite loop caused by bad typing in original CSS parser.
Fixing infinite loop caused by bad typing in original CSS parser.

fxtentacle/tilemill,nyimbi/tilemill,paulovieira/tilemill-clima,nyimbi/tilemill,fxtentacle/tilemill,fxtentacle/tilemill,tizzybec/tilemill,nyimbi/tilemill,paulovieira/tilemill-clima,mbrukman/tilemill,tizzybec/tilemill,fxtentacle/tilemill,MappingKat/tilemill,tizzybec/tilemill,Zhao-Qi/tilemill,florianf/tileoven,Teino1978-Corp/Teino1978-Corp-tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,Zhao-Qi/tilemill,tizzybec/tilemill,tilemill-project/tilemill,tilemill-project/tilemill,mbrukman/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,Zhao-Qi/tilemill,paulovieira/tilemill-clima,mbrukman/tilemill,MappingKat/tilemill,MappingKat/tilemill,isaacs/tilemill,isaacs/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,MappingKat/tilemill,tizzybec/tilemill,paulovieira/tilemill-clima,paulovieira/tilemill-clima,nyimbi/tilemill,florianf/tileoven,tilemill-project/tilemill,fxtentacle/tilemill,florianf/tileoven,Zhao-Qi/tilemill,mbrukman/tilemill,isaacs/tilemill,MappingKat/tilemill,mbrukman/tilemill,Zhao-Qi/tilemill,nyimbi/tilemill