Reinstate the user-defined copy-assignment operator

Because without it other ill-defined code may crash.

Author: orengg

System/Vector.cpp

@@ -69,6 +69,16 @@ namespace RTE {
 		return returnVector;
 	}
 
+/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+	Vector & Vector::operator=(const Vector &rhs) {
+		if (*this != rhs) {
+			m_X = rhs.m_X;
+			m_Y = rhs.m_Y;
+		}
+		return *this;
+	}
+
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
 	Vector & Vector::operator=(const std::deque<Vector> &rhs) {

System/Vector.h

@@ -339,7 +339,7 @@ namespace RTE {
 		/// </summary>
 		/// <param name="rhs">A Vector reference.</param>
 		/// <returns>A reference to the changed Vector.</returns>
-		Vector & operator=(const Vector &rhs) = default;
+		Vector & operator=(const Vector &rhs);
 
 		/// <summary>
 		/// An assignment operator for setting this Vector equal to the average of an std::deque of Vectors.