Also swap ao

Author: TBlueF

core/src/main/java/de/bluecolored/bluemap/core/map/hires/ArrayTileModel.java

@@ -216,6 +216,12 @@ public ArrayTileModel invertOrientation(int face) {
         uv[index + 4    ] = x;
         uv[index + 4 + 1] = y;
 
+        // swap first and last ao
+        index = face * FI_AO;
+        x = ao[index];
+        ao[index] = ao[index + 2];
+        ao[index + 2] = x;
+
         return this;
     }