Do not bail too early when trapping properties in `acs` scriptlet

Related feedback:
- https://github.com/uBlockOrigin/uBlock-issues/issues/2130#issuecomment-1621684566

assets/resources/scriptlets.js

@@ -253,6 +253,7 @@ function abortCurrentScriptCore(
     for (;;) {
         prop = chain.shift();
         if ( chain.length === 0 ) { break; }
+        if ( prop in owner === false ) { break; }
         owner = owner[prop];
         if ( owner instanceof Object === false ) { return; }
     }