Adds a text string to an open file. Currently, this function is only used to write to the Objects.c file in the SaveScenarioObjects callback defined in System.ocg/SaveScenario.c (See
Scenario objects saving).
global func SaveScenarioObjects(f)
{
FileWrite(f, "func InitializeObjects() { return true; }\n");
}
When the user presses "Save scenario" in the editor, he won't save any objects.