fix memory leak in load_map when using libxml2 by freeing the libxml tree as per http://xmlsoft.org/xmlmem.html - closes #473 - thanks mishok13 for the detailed report and testing
fix memory leak in load_map when using libxml2 by freeing the libxml tree as per http://xmlsoft.org/xmlmem.html - closes #473 - thanks mishok13 for the detailed report and testing

mapycz/python-mapnik,cjmayo/mapnik,mapycz/mapnik,pnorman/mapnik,lightmare/mapnik,yohanboniface/python-mapnik,naturalatlas/mapnik,garnertb/python-mapnik,Airphrame/mapnik,kapouer/mapnik,Uli1/mapnik,strk/mapnik,stefanklug/mapnik,lightmare/mapnik,davenquinn/python-mapnik,sebastic/python-mapnik,mapnik/mapnik,kapouer/mapnik,qianwenming/mapnik,Mappy/mapnik,qianwenming/mapnik,Uli1/mapnik,manz/python-mapnik,naturalatlas/mapnik,garnertb/python-mapnik,yiqingj/work,mapycz/mapnik,tomhughes/python-mapnik,whuaegeanse/mapnik,whuaegeanse/mapnik,jwomeara/mapnik,mapycz/python-mapnik,yiqingj/work,naturalatlas/mapnik,tomhughes/python-mapnik,manz/python-mapnik,stefanklug/mapnik,mapnik/mapnik,mapnik/mapnik,mapnik/python-mapnik,pnorman/mapnik,pnorman/mapnik,yiqingj/work,qianwenming/mapnik,zerebubuth/mapnik,qianwenming/mapnik,mbrukman/mapnik,Uli1/mapnik,lightmare/mapnik,Uli1/mapnik,mapnik/python-mapnik,yiqingj/work,strk/mapnik,Airphrame/mapnik,stefanklug/mapnik,pnorman/mapnik,davenquinn/python-mapnik,Mappy/mapnik,mbrukman/mapnik,tomhughes/mapnik,CartoDB/mapnik,tomhughes/python-mapnik,tomhughes/mapnik,yohanboniface/python-mapnik,mbrukman/mapnik,garnertb/python-mapnik,jwomeara/mapnik,tomhughes/mapnik,kapouer/mapnik,rouault/mapnik,CartoDB/mapnik,lightmare/mapnik,pramsey/mapnik,cjmayo/mapnik,pramsey/mapnik,naturalatlas/mapnik,pramsey/mapnik,strk/mapnik,mapnik/python-mapnik,rouault/mapnik,Mappy/mapnik,Mappy/mapnik,kapouer/mapnik,rouault/mapnik,rouault/mapnik,jwomeara/mapnik,Airphrame/mapnik,cjmayo/mapnik,davenquinn/python-mapnik,manz/python-mapnik,stefanklug/mapnik,qianwenming/mapnik,mapycz/mapnik,zerebubuth/mapnik,mbrukman/mapnik,zerebubuth/mapnik,jwomeara/mapnik,sebastic/python-mapnik,whuaegeanse/mapnik,sebastic/python-mapnik,cjmayo/mapnik,yohanboniface/python-mapnik,CartoDB/mapnik,mapnik/mapnik,Airphrame/mapnik,strk/mapnik,pramsey/mapnik,tomhughes/mapnik,whuaegeanse/mapnik