Added the following permissions (#527, #585, #627):

* edit_issue_notes: let user edit any notes
* edit_own_issue_notes: let user edit his own notes only

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1152 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/functional/journals_controller_test.rb

@@ -48,4 +48,12 @@ class JournalsControllerTest < ActionController::TestCase
     assert_select_rjs :replace, 'journal-2-notes'
     assert_equal 'Updated notes', Journal.find(2).notes
   end
+  
+  def test_post_edit_with_empty_notes
+    @request.session[:user_id] = 1
+    xhr :post, :edit, :id => 2, :notes => ''
+    assert_response :success
+    assert_select_rjs :remove, 'change-2'
+    assert_nil Journal.find_by_id(2)
+  end
 end