Remove one level of indentation on backlog sortable module.

app/coffee/modules/backlog/sortable.coffee

@@ -39,7 +39,6 @@ deleteElement = (el) ->
     el.off()
     el.remove()
 
-
 BacklogSortableDirective = ($repo, $rs, $rootscope) ->
     # Notes about jquery bug:
     # http://stackoverflow.com/questions/5791886/jquery-draggable-shows-
@@ -48,7 +47,8 @@ BacklogSortableDirective = ($repo, $rs, $rootscope) ->
     link = ($scope, $el, $attrs) ->
         bindOnce $scope, "project", (project) ->
             # If the user has not enough permissions we don't enable the sortable
-            if project.my_permissions.indexOf("modify_us") > -1
+            if not (project.my_permissions.indexOf("modify_us") > -1)
+                return
 
             $el.sortable({
                 connectWith: ".sprint-table"