incorporated review comments

Author: comcalvi

packages/@aws-cdk/cloudformation-include/lib/cfn-include.ts

@@ -513,18 +513,19 @@ export class CfnInclude extends core.CfnElement {
     const template = new CfnInclude(nestedStack, nestedStackId, this.nestedStacksToInclude[nestedStackId]);
 
     // remove parameters replaced in the child stack from the parent's CloudFormation::Stack resource
-    const parameters = nestedStackProps.Parameters;
+    if (nestedStackProps.Parameters) {
+      const parameters = nestedStackProps.Parameters;
 
-    for (const param of Object.keys(parameters)) {
-      if (template.parametersToReplace[param]) {
-        delete parameters[param];
+      for (const param of Object.keys(parameters)) {
+        if (template.parametersToReplace[param]) {
+          delete parameters[param];
+        }
       }
-    }
 
-    if (parameters.length === 0) {
-      delete nestedStackProps.Parameters;
+      if (parameters.length === 0) {
+        delete nestedStackProps.Parameters;
+      }
     }
-
     const includedStack: IncludedNestedStack = { stack: nestedStack, includedTemplate: template };
     this.nestedStacks[nestedStackId] = includedStack;