Fails when a field doesn't have a type

[donald-richardson-dxd]

I'm not sure why the field doesn't have a type but it's straight from buildClientSchema from an introspection query.

I modified the top of generateQueryRecursive as follows to fix:

      let curType = field.type;
  
      if(curType === undefined)
      {
        return {
          queryStr: '    '.repeat(curDepth) + field.name,
          argumentsDict
        }
      }
  
      while (curType.ofType) curType = curType.ofType;