Fix for nil errors on several pages

bap14 / redmine_category_tree

Module for Redmine to allow categories to be a tree instead of a single-list

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Closed KappaNossi closed 11 years ago

KappaNossi commented 11 years ago

This commit fixes error 500 on

issue list (when there were issues without category)
issue show (same)
project settings (missing reference to helper)
create/edit category (empty category object included in @project.issue_categories because of 'build' in controller method 'new')