adds specialization of write_vector_with_single_rank

cpp/hdf5_tools.cpp

@@ -552,6 +552,12 @@ int hdf5_tools::write_vector_with_single_rank(
         const hid_t group,
         const std::string dset_name);
 
+template
+int hdf5_tools::write_vector_with_single_rank(
+        const std::vector<long long int> v,
+        const hid_t group,
+        const std::string dset_name);
+
 template
 int hdf5_tools::gather_and_write_with_single_rank<double>(
         const int myrank,