The server doesn't send back a block if this value is false - assume …

…false if nil. (#3756)

third_party/terraform/resources/resource_container_cluster.go.erb

@@ -3326,7 +3326,11 @@ func flattenMasterAuthorizedNetworksConfig(c *containerBeta.MasterAuthorizedNetw
 <% unless version == 'ga' -%>
 func flattenPodSecurityPolicyConfig(c *containerBeta.PodSecurityPolicyConfig) []map[string]interface{} {
 	if c == nil {
-		return nil
+		return []map[string]interface{}{
+			{
+				"enabled": false,
+			},
+		}
 	}
 	return []map[string]interface{}{
 		{