Fix compilation in 64 bit architecture

src/graph/misc/graph_rewiring.cc

@@ -32,7 +32,7 @@ using namespace boost::lambda;
 void random_rewire(GraphInterface& gi, string strat, bool self_loops,
                    bool parallel_edges, size_t seed)
 {
-    rng_t rng(seed);
+    rng_t rng((uint32_t) seed);
 
     GraphInterface::edge_index_map_t edge_index =
         any_cast<GraphInterface::edge_index_map_t>(gi.GetEdgeIndex());

src/graph/numpy_bind.hh

@@ -84,7 +84,7 @@ python::object wrap_vector_not_owned(vector<ValueType>& vec)
 {
     PyArrayObject* ndarray;
     int val_type = mpl::at<numpy_types,ValueType>::type::value;
-    int size = vec.size();
+    npy_intp size = vec.size();
     if (vec.empty())
         ndarray = (PyArrayObject*) PyArray_SimpleNew(1, &size, val_type);
     else