fixme

[artem]

Empty envelopes are causing infinite recursive splitting in quad_tree.

[artem]

#include <iostream>
#include "quad_tree.hpp"
#include "envelope.hpp"

int main ()
{
   typedef mapnik::Envelope<double> box_t;
   std::cout << "quad_tree test\n";
   mapnik::quad_tree<int> tree(box_t(0,0,100,100));
   tree.insert(1, box_t(20,20,25,25));
   tree.insert(2, box_t(10,10,11,11));
   tree.insert(3, box_t(50,50,50,50)); // this will segfault 
   
   return EXIT_SUCCESS;
}

[artem]

Added max_depth_ (default 8) member variable which controls how deep tree allowed to grow.