updated kustomize_install_helm_charts.sh

kustomize_install_helm_charts.sh

@@ -51,6 +51,7 @@ helm_repos="$(helm repo list -o yaml | yq -r '.[] | [.name, .url] | @tsv' || :)"
 
 "$srcdir/kustomize_parse_helm_charts.sh" "$@" |
 while read -r repo_url name version values_file; do
+    values_file="${values_file:-}"
     if ! grep -Eq "^$name[[:space:]]+$repo_url[[:space:]]*$" <<< "$helm_repos"; then
         timestamp "Adding Helm repo '$repo_url' as name '$name'"
         # might fail here if you've already installed a repo with this name, in which case, fix your repos, we don't want to remove/modify your existing repos