Trade: defaulted move constructor/assignment.

Hope they will work as expected. Copying is still forbidden, as it
brings serious performance impact for no useful reason.

src/Trade/MeshData2D.h

@@ -35,9 +35,7 @@ type.
 */
 class MAGNUM_EXPORT MeshData2D {
     MeshData2D(const MeshData2D& other) = delete;
-    MeshData2D(MeshData2D&& other) = delete;
     MeshData2D& operator=(const MeshData2D& other) = delete;
-    MeshData2D& operator=(MeshData2D&& other) = delete;
 
     public:
         /**
@@ -52,9 +50,15 @@ class MAGNUM_EXPORT MeshData2D {
          */
         inline MeshData2D(Mesh::Primitive primitive, std::vector<std::uint32_t>* indices, std::vector<std::vector<Point2D>*> positions, std::vector<std::vector<Vector2>*> textureCoords2D): _primitive(primitive), _indices(indices), _positions(positions), _textureCoords2D(textureCoords2D) {}
 
+        /** @brief Move constructor */
+        MeshData2D(MeshData2D&&) = default;
+
         /** @brief Destructor */
         ~MeshData2D();
 
+        /** @brief Move assignment */
+        MeshData2D& operator=(MeshData2D&&) = default;
+
         /** @brief Primitive */
         inline Mesh::Primitive primitive() const { return _primitive; }
 

src/Trade/MeshData3D.h

@@ -35,9 +35,7 @@ type.
 */
 class MAGNUM_EXPORT MeshData3D {
     MeshData3D(const MeshData3D& other) = delete;
-    MeshData3D(MeshData3D&& other) = delete;
     MeshData3D& operator=(const MeshData3D& other) = delete;
-    MeshData3D& operator=(MeshData3D&& other) = delete;
 
     public:
         /**
@@ -53,9 +51,15 @@ class MAGNUM_EXPORT MeshData3D {
          */
         inline MeshData3D(Mesh::Primitive primitive, std::vector<std::uint32_t>* indices, std::vector<std::vector<Point3D>*> positions, std::vector<std::vector<Vector3>*> normals, std::vector<std::vector<Vector2>*> textureCoords2D): _primitive(primitive), _indices(indices), _positions(positions), _normals(normals), _textureCoords2D(textureCoords2D) {}
 
+        /** @brief Move constructor */
+        MeshData3D(MeshData3D&&) = default;
+
         /** @brief Destructor */
         ~MeshData3D();
 
+        /** @brief Move assignment */
+        MeshData3D& operator=(MeshData3D&&) = default;
+
         /** @brief Primitive */
         inline Mesh::Primitive primitive() const { return _primitive; }