Implement Helicopter::VTable0xe4 (#243)

Clean up parent classes

LEGO1/legopathactor.h

@@ -25,6 +25,33 @@ public:
   {
     return !strcmp(name, LegoPathActor::ClassName()) || LegoActor::IsA(name);
   }
+
+  virtual void VTable0x68(); // vtable+0x68
+  virtual void VTable0x6c(); // vtable+0x6c
+  virtual void VTable0x70(); // vtable+0x70
+  virtual void VTable0x74(); // vtable+0x74
+  virtual void VTable0x78(); // vtable+0x78
+  virtual void VTable0x7c(); // vtable+0x7c
+  virtual void VTable0x80(); // vtable+0x80
+  virtual void VTable0x84(); // vtable+0x84
+  virtual void VTable0x88(); // vtable+0x88
+  virtual void VTable0x8c(); // vtable+0x8c
+  virtual void VTable0x90(); // vtable+0x90
+  virtual void VTable0x94(); // vtable+0x94
+  virtual void VTable0x98(); // vtable+0x98
+  virtual void VTable0x9c(); // vtable+0x9c
+  virtual void VTable0xa0(); // vtable+0xa0
+  virtual void VTable0xa4(); // vtable+0xa4
+  virtual void VTable0xa8(); // vtable+0xa8
+  virtual void VTable0xac(); // vtable+0xac
+  virtual void VTable0xb0(); // vtable+0xb0
+  virtual void VTable0xb4(); // vtable+0xb4
+  virtual void VTable0xb8(); // vtable+0xb8
+  virtual void VTable0xbc(); // vtable+0xbc
+  virtual void VTable0xc0(); // vtable+0xc0
+  virtual void VTable0xc4(); // vtable+0xc4
+  virtual void VTable0xc8(); // vtable+0xc8
+  
 protected:
   // TODO: the types
   undefined unk78[0xc4];