missing header

source/eloss/GslIntegrator.cpp

@@ -7,6 +7,7 @@
 #include <ausa/eloss/StoppingPowerCalculator.h>
 
 #include <cmath>
+#include <algorithm>
 using namespace std;
 using namespace AUSA::EnergyLoss;
 
@@ -237,4 +238,4 @@ double GslIntegrator::getCutOff() const {
 
 AUSA::EnergyLoss::GslIntegrator::~GslIntegrator() {
     // Do nothing
-}
\ No newline at end of file
+}