Added missing header under Linux.

Libs/DICOM/Core/Testing/Cpp/ctkDICOMDatabaseTest1.cpp

@@ -9,6 +9,7 @@
 
 // STD includes
 #include <iostream>
+#include <cstdlib>
 
 
 int ctkDICOMDatabaseTest1( int argc, char * argv [] )

Libs/DICOM/Core/Testing/Cpp/ctkDICOMPersonNameTest1.cpp

@@ -9,6 +9,7 @@
 
 // STD includes
 #include <iostream>
+#include <cstdlib>
 
 
 int ctkDICOMPersonNameTest1( int argc, char * argv [] )