Fix data.title replace when it's null/undefined

[luigifab]

Description

This fix one error (I don't remember when it happen, I found it with Sentry), here is a way to reproduce it manually:

09:37:42,200 > a = {};
09:37:53,486 > a.title.replace('"', """);
09:37:53,558 < Uncaught TypeError: a.title is undefined
09:38:01,969 > a = { title: null };
09:38:05,307 > a.title.replace('"', "&quot;");
09:38:05,380 < Uncaught TypeError: a.title is null
09:38:41,052 > a = { title: undefined };
09:38:43,659 > a.title.replace('"', "&quot;");
09:38:43,731 < Uncaught TypeError: a.title is undefined

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