var name change

just cosmetic, it is the same reference.

Babylon/Tools/babylon.sceneSerializer.js

@@ -106,8 +106,8 @@ var BABYLON;
             serializationObject.alpha = arcCamera.alpha;
             serializationObject.beta = arcCamera.beta;
             serializationObject.radius = arcCamera.radius;
-            if (arcCamera.target && camera.target.id) {
-                serializationObject.lockedTargetId = camera.target.id;
+            if (arcCamera.target && arcCamera.target.id) {
+                serializationObject.lockedTargetId = arcCamera.target.id;
             }
         }
         else if (camera instanceof BABYLON.FollowCamera) {

Babylon/Tools/babylon.sceneSerializer.ts

@@ -105,8 +105,8 @@
             serializationObject.alpha = arcCamera.alpha;
             serializationObject.beta = arcCamera.beta;
             serializationObject.radius = arcCamera.radius;
-            if (arcCamera.target && camera.target.id) {
-                serializationObject.lockedTargetId = camera.target.id;
+            if (arcCamera.target && arcCamera.target.id) {
+                serializationObject.lockedTargetId = arcCamera.target.id;
             }
         } else if (camera instanceof FollowCamera) {
             var followCam = <FollowCamera> camera;