Vector: Add constructor from Foam::zero

src/OpenFOAM/primitives/Vector/Vector.H

@@ -81,6 +81,9 @@ public:
         //- Construct null
         inline Vector();
 
+        //- Construct initialized to zero
+        inline explicit Vector(const Foam::zero);
+
         //- Construct given VectorSpace of the same rank
         template<class Cmpt2>
         inline Vector(const VectorSpace<Vector<Cmpt2>, Cmpt2, 3>&);

src/OpenFOAM/primitives/Vector/VectorI.H

@@ -30,6 +30,13 @@ inline Foam::Vector<Cmpt>::Vector()
 {}
 
 
+template<class Cmpt>
+inline Foam::Vector<Cmpt>::Vector(const Foam::zero z)
+:
+    Vector::vsType(z)
+{}
+
+
 template<class Cmpt>
 template<class Cmpt2>
 inline Foam::Vector<Cmpt>::Vector