noosfero | Fixes crash when processing suggest an article task (#786)

[Antonio Terceiro]

Merge Request #786 was merged
Merge Request url: https://gitlab.com/noosfero/noosfero/merge_requests/786
Project:Branches: larissa/noosfero:suggest-article-crash to noosfero/noosfero:master
Author: Larissa Reis
Assignee: 
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