use platform specific macros as return codes (EXIT_SUCCESS/EXIT_FAILURE) + check if extent read from shapefile is valid and has valid width and heoght before creating an index.
use platform specific macros as return codes (EXIT_SUCCESS/EXIT_FAILURE) + check if extent read from shapefile is valid and has valid width and heoght before creating an index.

naturalatlas/mapnik,mapycz/mapnik,zerebubuth/mapnik,pnorman/mapnik,naturalatlas/mapnik,mapycz/mapnik,CartoDB/mapnik,mapycz/mapnik,pnorman/mapnik,lightmare/mapnik,CartoDB/mapnik,mapnik/mapnik,tomhughes/mapnik,tomhughes/mapnik,mapnik/mapnik,naturalatlas/mapnik,mapnik/mapnik,lightmare/mapnik,zerebubuth/mapnik,lightmare/mapnik,tomhughes/mapnik,lightmare/mapnik,mapnik/mapnik,tomhughes/mapnik,pnorman/mapnik,naturalatlas/mapnik,CartoDB/mapnik,pnorman/mapnik,zerebubuth/mapnik