Add LegoVehicleBuildState (#213)

* Add LegoVehicleBuildState

* Update LegoVehicleBuildState member-var names to include offsets

LEGO1/legovehiclebuildstate.h

@@ -0,0 +1,60 @@
+#ifndef LEGOVEHICLEBUILDSTATE_H
+#define LEGOVEHICLEBUILDSTATE_H
+
+#include "legostate.h"
+#include "mxstring.h"
+#include "decomp.h"
+
+#include "decomp.h"
+
+// VTABLE 0x100d66e0
+// SIZE 0x50 (from 1000acd7)
+class LegoVehicleBuildState : public LegoState
+{
+public:
+  LegoVehicleBuildState(char* p_classType);
+
+  // OFFSET: LEGO1 0x10025ff0
+  inline virtual const char *ClassName() const override // vtable+0x0c
+  {
+    return this->m_className.GetData();
+  }
+
+  // OFFSET: LEGO1 0x10026000
+  inline virtual MxBool IsA(const char *p_name) const override // vtable+0x10
+  {
+    return !strcmp(p_name, this->m_className.GetData()) || LegoState::IsA(p_name);
+  }
+
+public:
+  struct UnkStruct
+  {
+    undefined4 m_unk00;
+    undefined2 m_unk04;
+    undefined2 m_unk06;
+    undefined2 m_unk08;
+
+    UnkStruct();
+  };
+private:
+  UnkStruct m_unk08[4]; // 0x08
+
+  // This can be one of the following:
+  // * LegoRaceCarBuildState
+  // * LegoCopterBuildState
+  // * LegoDuneCarBuildState
+  // * LegoJetskiBuildState
+  MxString m_className; // 0x38
+
+  // Known States:
+  // * 1 == enter(ing) build screen
+  // * 3 == cutscene/dialogue
+  // * 6 == exit(ing) build screen
+  MxU32 m_animationState; // 0x48
+  undefined m_unk4c; // 0x4c
+  undefined m_unk4d; // 0x4d
+  undefined m_unk4e; // 0x4e
+  MxU8 m_placedPartCount; // 0x4f
+};
+
+#endif // LEGOVEHICLEBUILDSTATE_H