Adding the cstddef header so it is visible in all the c++ source files

src/continued_fraction.hpp

@@ -24,6 +24,7 @@
 #include <vector>
 #include <fstream>
 #include <iomanip>
+#include <cstddef>
 
 struct ContinuedFraction {
   // Constructors

src/load_data_for_complexity.hpp

@@ -22,6 +22,7 @@
 
 #include <string>
 #include <vector>
+#include <cstddef>
 
 size_t
 load_coverage_counts_MR(const bool VERBOSE,

src/moment_sequence.hpp

@@ -22,6 +22,7 @@
 
 #include <vector>
 #include <numeric>
+#include <cstddef>
 
 // test Hankel moment matrix to ensure the moment sequence
 // is positive definite

src/preseq.cpp

@@ -32,6 +32,7 @@
 #include <fstream>
 #include <iostream>
 #include <random>
+#include <cstddef>
 
 #include <OptionParser.hpp>
 #include <smithlab_utils.hpp>

src/to-mr.cpp

@@ -25,6 +25,7 @@
 #include <fstream>
 #include <unordered_map>
 #include <stdexcept>
+#include <cstddef>
 
 #include "OptionParser.hpp"
 #include "smithlab_utils.hpp"