One more missing Result::ok() call in art/libnativeloader

No functionality change.

Test: m
Change-Id: I3056596785447c5fb7410bcfc7d037eb295affc4
diff --git a/libnativeloader/library_namespaces.cpp b/libnativeloader/library_namespaces.cpp
index b20be91..99587e4 100644
--- a/libnativeloader/library_namespaces.cpp
+++ b/libnativeloader/library_namespaces.cpp
@@ -294,7 +294,7 @@
   if (!vendor_public_libraries().empty()) {
     auto vendor_ns = NativeLoaderNamespace::GetExportedNamespace(kVendorNamespaceName, is_bridged);
     // when vendor_ns is not configured, link to the system namespace
-    auto target_ns = vendor_ns ? vendor_ns : platform_ns;
+    auto target_ns = vendor_ns.ok() ? vendor_ns : platform_ns;
     if (target_ns.ok()) {
       linked = app_ns->Link(*target_ns, vendor_public_libraries());
       if (!linked.ok()) {