check if enum_values are existing

If no enum_values are given for in a serverUrl, the check must be ignored.

Author: KaiUweHueber-TRUMPF

modules/openapi-generator/src/main/resources/csharp/Configuration.mustache

@@ -603,7 +603,7 @@ namespace {{packageName}}.Client
 
                     if (inputVariables.ContainsKey(variable.Key))
                     {
-                        if (((List<string>)serverVariables["enum_values"]).Contains(inputVariables[variable.Key]))
+                        if (!serverVariables.ContainsKey("enum_values") || ((List<string>)serverVariables["enum_values"]).Contains(inputVariables[variable.Key]))
                         {
                             url = url.Replace("{" + variable.Key + "}", inputVariables[variable.Key]);
                         }