Add trivial constructors to pointers.

src/Memory/__BorrowedPtr.hpp

@@ -14,6 +14,7 @@ namespace ArbUt {
         T* _raw;
 
     public:
+        inline BorrowedPtr<T>(){}
         /// @brief Initialise a BorrowedPtr with a specific raw pointer.
         inline BorrowedPtr<T>(T* ptr) : _raw(ptr) { AssertNotNull(ptr); };
         /// @brief Initialise a BorrowedPtr from a copy.

src/Memory/__UniquePtr.hpp

@@ -14,6 +14,7 @@ namespace ArbUt {
         T* _raw;
 
     public:
+        inline UniquePtr<T>() {}
         /// @brief Initialise a UniquePtr with a specific raw pointer.
         inline UniquePtr<T>(T* ptr) : _raw(ptr) { AssertNotNull(ptr); };
         /// @brief Initialise a UniquePtr from a copy.