The IslePathActor's (#113)

* pizza: fix type m_unk90

* Initial implementation of a lot of IslePathActor's

All IslePathActor's seem to have (for the most part), the same few variables in common,
probably some ID. SkateBoard, Pizza and TowTrack seem to be a bit more complicated with additional
fields surrounding it.

* Add missing ClassName(s) and IsA(s)

* Add decomp size asserts

* Fix size assertions

* Make legopathactor fields protected for now, fix a type in Pizza

* Fix TowTrack structure

---------

Co-authored-by: Christian Semmler <mail@csemmler.com>

LEGO1/racecar.h

@@ -1,6 +1,7 @@
 #ifndef RACECAR_H
 #define RACECAR_H
 
+#include "decomp.h"
 #include "islepathactor.h"
 
 // VTABLE 0x100d6918
@@ -10,6 +11,22 @@ class RaceCar : public IslePathActor
 public:
   RaceCar();
   virtual ~RaceCar() override; // vtable+0x0
+
+  // OFFSET: LEGO1 0x10028270
+  inline virtual const char *ClassName() const override // vtable+0x0c
+  {
+    // 0x100f03e0
+    return "RaceCar";
+  }
+
+  // OFFSET: LEGO1 0x10028280
+  inline virtual MxBool IsA(const char *name) const override // vtable+0x10
+  {
+    return !strcmp(name, RaceCar::ClassName()) || IslePathActor::IsA(name);
+  }
+private:
+  // TODO: RaceCar fields
+  undefined m_unk160[4];
 };
 
 #endif // RACECAR_H