Include files for gcc 4.3

plugins/freeEnergy/platforms/reference/src/gbsa/CpuObcSoftcore.cpp

@@ -24,6 +24,7 @@
 
 #include <string.h>
 #include <sstream>
+#include <stdlib.h>
 
 //#include "../SimTKUtilities/SimTKOpenMMCommon.h"
 #include "../SimTKUtilities/SimTKOpenMMLog.h"

plugins/freeEnergy/platforms/reference/src/gbsa/GBVISoftcoreParameters.cpp

@@ -24,6 +24,7 @@
 
 #include <math.h>
 #include <sstream>
+#include <string.h>
 
 #include "GBVISoftcoreParameters.h"
 #include "../SimTKUtilities/SimTKOpenMMCommon.h"

plugins/freeEnergy/platforms/reference/src/gbsa/ObcSoftcoreParameters.cpp

@@ -23,6 +23,7 @@
  */
 
 #include <math.h>
+#include <string.h>
 #include <sstream>
 
 #include "ObcSoftcoreParameters.h"