Bootstrap MxDSMultiAction (#133)

* Bootstrap MxDSMultiAction

* Move destroy function to list class

* Fix unk14 call

LEGO1/mxdsactionlist.h

@@ -0,0 +1,28 @@
+#ifndef MXDSACTIONLIST_H
+#define MXDSACTIONLIST_H
+
+#include "decomp.h"
+#include "mxlist.h"
+
+class MxDSAction;
+
+// VTABLE 0x100dced8
+// SIZE 0x1c
+class MxDSActionList : public MxList<MxDSAction>
+{
+public:
+  MxDSActionList() {
+    this->m_unk18 = 0;
+  }
+
+  virtual MxS8 Compare(MxDSAction *, MxDSAction *); // +0x14
+
+  static void Destroy(MxDSAction *p_action);
+
+private:
+  undefined m_unk18;
+};
+
+typedef MxListCursorChild<MxDSAction> MxDSActionListCursor;
+
+#endif // MXDSACTIONLIST_H