Prevent recursion in MBTiles rendering.
Prevent recursion in MBTiles rendering.

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