Update UnhandledStreamPipe.ql

Address comments

Co-Authored-By: Asger F <316427+asgerf@users.noreply.github.com>

Author: Napalys

javascript/ql/src/Quality/UnhandledStreamPipe.ql

@@ -141,11 +141,12 @@ private predicate streamFlowStep(DataFlow::Node node1, DataFlow::Node node2) {
  * Tracks the result of a pipe call as it flows through the program.
  */
 private DataFlow::SourceNode destinationStreamRef(DataFlow::TypeTracker t, PipeCall pipe) {
-  t.start() and result = pipe
+  t.start() and
+  (result = pipe or result = pipe.getDestinationStream().getALocalSource())
   or
   exists(DataFlow::SourceNode prev |
     prev = destinationStreamRef(t.continue(), pipe) and
-    streamFlowStep(result.getALocalUse(), prev)
+    streamFlowStep(prev, result)
   )
   or
   exists(DataFlow::TypeTracker t2 | result = destinationStreamRef(t2, pipe).track(t2, t))