And include it where it should be included.

Author: Milo46

cpp-terminal/private/platform.cpp

@@ -1,5 +1,7 @@
 #include "platform.hpp"
 
+#include "inputOutputModeFlags.hpp"
+
 bool Term::Private::is_stdin_a_tty() {
 #ifdef _WIN32
  return _isatty(_fileno(stdin));