Issue when we add parent tag in the follow tag block to the Landing Page

Problem/Motivation

When we add parent tag as follow tag to the LLanding page we receive an error

Error: Call to a member function getName() on bool in social_follow_landing_page_preprocess_paragraph() (line 61 of profiles/contrib/social/modules/social_features/social_follow_taxonomy/modules/social_follow_landing_page/social_follow_landing_page.module).

Steps to reproduce

- Make sure that the "Allow category split." option is enabled
- Create/edit landing page
- Add tag section with first level tag

Proposed resolution

As even first level tags have parent with "0" id we need to check it.