Define MxLong/MxULong (#71)

* define MxLong/MxULong

The "long" type has different sizes on different platforms, and this may cause issues.

* use DWORD to match RegQueryValueExA arg

LEGO1/legopathcontroller.cpp

@@ -13,7 +13,7 @@ LegoPathController::~LegoPathController()
 }
 
 // OFFSET: LEGO1 0x10045c10 STUB
-long LegoPathController::Tickle()
+MxLong LegoPathController::Tickle()
 {
   // TODO
   return 0;