Fix level.dat spawn position not reading correctly

Author: TBlueF

core/src/main/java/de/bluecolored/bluemap/core/world/mca/data/LevelData.java

@@ -95,12 +95,12 @@ public static class Dimension {
     public static class Spawn {
 
         private Key dimension = DataPack.DIMENSION_OVERWORLD;
-        private Vector3i position = Vector3i.ZERO;
+        private Vector3i pos = Vector3i.ZERO;
         private float yaw = 0;
         private float pitch = 0;
 
-        public Spawn(Vector3i position) {
-            this.position = position;
+        public Spawn(Vector3i pos) {
+            this.pos = pos;
         }
 
     }