Merge: Codechange: Use null pointer literal instead of the NULL macro

src/network/network_internal.h

@@ -149,8 +149,8 @@ bool IsNetworkCompatibleVersion(const char *version, bool extended = false);
  * Everything we need to know about a command to be able to execute it.
  */
 struct CommandPacket : CommandContainer {
-	/** Make sure the pointer is NULL. */
-	CommandPacket() : next(NULL), company(INVALID_COMPANY), frame(0), my_cmd(false) {}
+	/** Make sure the pointer is nullptr. */
+	CommandPacket() : next(nullptr), company(INVALID_COMPANY), frame(0), my_cmd(false) {}
 	CommandPacket *next; ///< the next command packet (if in queue)
 	CompanyID company;   ///< company that is executing the command
 	uint32 frame;        ///< the frame in which this packet is executed