Added additional condition to ensure a default deployment doesn't use a blank...

Added additional condition to ensure a default deployment doesn't use a blank dictionary for k8s values

chart/templates/istio/values.yaml

@@ -90,7 +90,7 @@ ingressGateways:
 {{- range $name, $values := .Values.istio.ingressGateways }}
   {{ if ne $values.enabled false }}
   {{ $name | nindent 2 }}:
-    {{- if or (hasKey $values "k8s") (hasKey $values "kubernetesResourceSpec") }}
+    {{- if or (hasKey $values "k8s") (and (hasKey $values "kubernetesResourceSpec") (not (empty $values.kubernetesResourceSpec))) }}
       {{- toYaml (merge (dict "k8s" $values.kubernetesResourceSpec) (dict "k8s" $values.k8s)) | nindent 4 }}
     {{- else }}
       {{- toYaml (fromYaml (include "istio.ingressgateway.k8s" $values)) | nindent 4 }}