missed minification bug

Check SKP file version, return error string to JS caller

Change-Id: I063920259e3ead102a4c7173d7015ff98992bbf2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/310338
Reviewed-by: Nathaniel Nifong <nifong@google.com>
Commit-Queue: Nathaniel Nifong <nifong@google.com>
diff --git a/experimental/wasm-skp-debugger/helper.js b/experimental/wasm-skp-debugger/helper.js
index 8e56873..481378e 100644
--- a/experimental/wasm-skp-debugger/helper.js
+++ b/experimental/wasm-skp-debugger/helper.js
@@ -19,8 +19,8 @@
     // Free the memory that was used to hold the file, since it is now represented as an SkPicture
     this._free(fileMemPtr)
     return {
-        error: error,
-        player: player
+        'error': error,
+        'player': player
     };
   }