wacz replay: fix redirect loop on 404 (#125)

* wacz replay: fix redirect loop, use different var for foundHash vs
existing hash to avoid redirecting to the same URL
fixes webrecorder/replayweb.page#184

* bump version to 2.16.2

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@webrecorder/wabac",
-  "version": "2.16.1",
+  "version": "2.16.2",
   "main": "index.js",
   "type": "module",
   "license": "AGPL-3.0-or-later",

src/wacz/multiwacz.js

@@ -747,6 +747,8 @@ export class MultiWACZ extends OnDemandPayloadArchiveDB// implements WACZLoadSou
       return resp;
     }
 
+    let foundHash = null;
+
     for (const [name, file] of Object.entries(this.waczfiles)) {
       if (file.fileType !== WACZ_LEAF) {
         continue;
@@ -755,13 +757,13 @@ export class MultiWACZ extends OnDemandPayloadArchiveDB// implements WACZLoadSou
       resp = await super.getResource(request, prefix, event, {waczname: name, noFuzzyCheck: true});
       if (resp) {
         waczname = name;
-        hash = file.hash;
+        foundHash = file.hash;
         break;
       }
     }
 
     if (waczname) {   
-      return Response.redirect(`${prefix}:${hash}/${request.timestamp}mp_/${request.url}`);
+      return Response.redirect(`${prefix}:${foundHash}/${request.timestamp}mp_/${request.url}`);
     }
 
     if (this.fuzzyUrlRules.length) {