BinaryWriter: make non-copyable.

src/UESaveFile/BinaryWriter.h

@@ -33,6 +33,12 @@ class BinaryWriter {
         explicit BinaryWriter(const std::string& filename);
         ~BinaryWriter();
 
+        BinaryWriter(const BinaryWriter& other) = delete;
+        BinaryWriter& operator=(const BinaryWriter& other) = delete;
+
+        BinaryWriter(BinaryWriter&& other) = default;
+        BinaryWriter& operator=(BinaryWriter&& other) = default;
+
         auto open() -> bool;
 
         void closeFile();