Forgot the openc descriptor as friend class

Src/Components/FTestCell.hpp

@@ -22,6 +22,7 @@
 // To get access to descriptors
 class FTestCellCudaDescriptor;
 class FTestCellCudaConstDescriptor;
+struct FTestCell_Alignement;
 
 /**
  * @author Berenger Bramas (berenger.bramas@inria.fr)
@@ -119,6 +120,7 @@ public:
     // To get access to descriptor
     friend class FTestCellCudaDescriptor;
     friend class FTestCellCudaConstDescriptor;
+    friend struct FTestCell_Alignement;
 };
 
 #endif //FTESTCELL_HPP