make compile tests with g++ 4.3.x

[[Imported from SVN: r5328]]

common/bigunsignedint.hh

@@ -7,6 +7,7 @@
 
 #include <iostream>
 #include <limits>
+#include <cstdlib>
 #include <dune/common/exceptions.hh>
 
 /**

common/fvector.hh

@@ -5,6 +5,7 @@
 #define DUNE_FVECTOR_HH
 
 #include <cmath>
+#include <cstdlib>
 #include <cstddef>
 #include <complex>
 

common/test/smartpointertest.cc

@@ -4,6 +4,7 @@
 #include "config.h"
 
 #include <dune/common/smartpointer.hh>
+#include <cstdlib>
 #include <iostream>
 #include <vector>
 

common/test/tuplestest.cc

@@ -9,6 +9,7 @@
 #include <iostream>
 #include <vector>
 #include <cassert>
+#include <cstdlib>
 using namespace Dune;
 
 template<int i, int j>