Fixed Twitter card validator error if album description is empty

[Tom_]

If album description is empty there are no "twitter:description" -meta tag. Twitter require description meta tag.

Twitter validator error:
ERROR: Invalid value (message: Field description failed to validate because: text expects tag property, but not found in Map().)

 

[Chris D]

Thanks, this is sorted for the next release.

If there is no description, we put an arbitrary one, e.g. "Member album by X"