[refactor] BaseNPC now uses Entity XYZ fields for handling positions

- fixed many references to Entity.appearanceData.i[XYZ] to use the base Entity XYZ values
- BaseNPC::enterIntoViewOf grabs the position from the base Entity XYZ values
- NPCManager::updateNPCPosition updates the base Entity XYZ values
- MobAI.c/deadStep() also sends it's packet based on the Entity XYZ values

src/Entities.hpp

@@ -77,10 +77,10 @@ class BaseNPC : public Entity {
 public:
     sNPCAppearanceData appearanceData = {};
 
-    BaseNPC(int x, int y, int z, int angle, uint64_t iID, int t, int id) { // XXX
-        appearanceData.iX = x;
-        appearanceData.iY = y;
-        appearanceData.iZ = z;
+    BaseNPC(int _X, int _Y, int _Z, int angle, uint64_t iID, int t, int id) { // XXX
+        x = _X;
+        y = _Y;
+        z = _Z;
         appearanceData.iNPCType = t;
         appearanceData.iHP = 400;
         appearanceData.iAngle = angle;