pw_containers: Fix variables in filtered_view_test

The tests were iterating over the incorrect container in a few places.

Change-Id: I8dfebd58c48c11aea538e05298e2cc75ed1542fd
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/110990
Pigweed-Auto-Submit: Wyatt Hepler <hepler@google.com>
Reviewed-by: Ewout van Bekkum <ewout@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/pw_containers/filtered_view_test.cc b/pw_containers/filtered_view_test.cc
index ddd97e9..4d32a58 100644
--- a/pw_containers/filtered_view_test.cc
+++ b/pw_containers/filtered_view_test.cc
@@ -69,7 +69,7 @@
 
   IntrusiveList<Item> intrusive_list;
   for (const Item& unused :
-       FilteredView(nothing, [](const Item&) { return true; })) {
+       FilteredView(intrusive_list, [](const Item&) { return true; })) {
     static_cast<void>(unused);
     FAIL();
   }
@@ -115,7 +115,7 @@
   IntrusiveList<Item> intrusive_list({&item_1, &item_2, &item_3});
 
   for (const Item& unused :
-       FilteredView(kArray, [](const Item&) { return false; })) {
+       FilteredView(intrusive_list, [](const Item&) { return false; })) {
     static_cast<void>(unused);
     FAIL();
   }