(svn r23778) -Fix [FS#4957]: trim all control codes and the likes from strings being passed into the AI. If the AI would be displaying them later we would be showing those control codes as question marks.

src/script/api/script_object.cpp

@@ -239,6 +239,7 @@ ScriptObject::ActiveInstance::~ActiveInstance()
 {
 	char buffer[64];
 	::GetString(buffer, string, lastof(buffer));
+	::str_validate(buffer, lastof(buffer), SVS_NONE);
 	return ::strdup(buffer);
 }