small fix for windows

source/arg_func.cpp

@@ -5,6 +5,7 @@
 #include <cstring>
 #include <filesystem>
 #include <vector>
+#include <algorithm>
 
 #include "arg_func.hpp"
 #include "func.hpp"
@@ -335,5 +336,5 @@ void arg_file(Buffer &decrypted_buffer, Buffer &encrypted_buffer, const char *la
 		return;
 
 	crypto.encrypt(&decrypted_buffer, &encrypted_buffer);
-	encrypted_buffer.save_to_file(save);
+	encrypted_buffer.save_to_file(save.string());
 }