Adds subtasks to GET /issues/:id API (#5338).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4465 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/issues/show.apit

@@ -29,6 +29,8 @@ api.issue do
   api.created_on @issue.created_on
   api.updated_on @issue.updated_on
   
+  render_api_issue_children(@issue, api)
+  
   api.array :relations do
   	@issue.relations.select {|r| r.other_issue(@issue).visible? }.each do |relation|
   		api.relation(:id => relation.id, :issue_id => relation.other_issue(@issue).id, :relation_type => relation.relation_type_for(@issue), :delay => relation.delay)