cleaned up patching of virtual functions; started CAutomobile

src/vehicles/Boat.cpp

@@ -9,6 +9,12 @@ CBoat::CBoat(int mi, uint8 owner)
 
 WRAPPER CBoat* CBoat::ctor(int, uint8) { EAXJMP(0x53E3E0); }
 
+class CBoat_ : public CBoat
+{
+public:
+	void dtor() { CBoat::~CBoat(); };
+};
+
 STARTPATCHES
-InjectHook(0x53E790, &CBoat::dtor, PATCH_JUMP);
-ENDPATCHES
+	InjectHook(0x53E790, &CBoat_::dtor, PATCH_JUMP);
+ENDPATCHES