Fix BBOX in geographic WGS84 (epsg:4326) calc logic
Fix BBOX in geographic WGS84 (epsg:4326) calc logic

mapnik/mapnik,tomhughes/mapnik,lightmare/mapnik,lightmare/mapnik,mapnik/mapnik,mapnik/mapnik,lightmare/mapnik,tomhughes/mapnik,tomhughes/mapnik,lightmare/mapnik,tomhughes/mapnik,mapnik/mapnik