Fix pybind11 type and signature handling issues

src/mapnik_font_engine.cpp

@@ -25,6 +25,7 @@
 #include <mapnik/font_engine_freetype.hpp>
 //pybind11
 #include <pybind11/pybind11.h>
+#include <pybind11/stl.h>
 
 namespace py = pybind11;
 

src/mapnik_map.cpp

@@ -295,7 +295,7 @@ void export_map(py::module const& m)
              "<mapnik._mapnik.Featureset object at 0x23b0b0>\n"
              ">>> featureset.features\n"
              ">>> [<mapnik.Feature object at 0x3995630>]\n",
-             py::arg("layer idx"), py::arg("x"), py::arg("y")
+             py::arg("layer_idx"), py::arg("x"), py::arg("y")
             )
 
         .def("remove_all", &Map::remove_all,

src/mapnik_value_converter.hpp

@@ -180,7 +180,7 @@ struct type_caster<mapnik::value_holder>
         {
             PyObject *tmp = PyNumber_Long(source);
             if (!tmp) return false;
-            value = PyLong_AsLongLong(tmp);
+            value = PyLong_AsLong(tmp);
             Py_DecRef(tmp);
             return !PyErr_Occurred();
         }