Fixed exception if `content` is unassigned
Fixed exception if `content` is unassigned

simar0at/delphi-rest-client-api,monde-sistemas/delphi-rest-client-api,simar0at/delphi-rest-client-api,fabriciocolombo/delphi-rest-client-api,simar0at/delphi-rest-client-api,thomaserlang/delphi-rest-client-api,fabriciocolombo/delphi-rest-client-api,simar0at/delphi-rest-client-api,fabriciocolombo/delphi-rest-client-api,monde-sistemas/delphi-rest-client-api,thomaserlang/delphi-rest-client-api,thomaserlang/delphi-rest-client-api,monde-sistemas/delphi-rest-client-api