Manually set URL aliases get discarded and replaced by an automatic alias when the derived translation node is saved

Scenario:
Two language site -- en, it

Create a node in English. Uncheck the "Generate automatic URL alias" checkbox and manually insert an alias.

Create a translation of the node in Italian. Uncheck it's auto URL alias check, create and alias and save.

The Italian node has the manually created alias, but the English node now has an automatically generated alias and its "Generate automatic URL alias" checkbox is checked.

In examining the process, it looks like pathauto_node_update_alias() gets called for each translated node, because of my translation synchronization settings.

However, in the translated nodes processed AFTER the actual node being edited, the $node->path property is not set.

On line 460 in pathauto.module, changing the test to the following causes the correct behavior, though I'm not sure this is the correct solution:

Old code:

  if (isset($node->path['pathauto']) && empty($node->path['pathauto'])) {

My "fix":

  if (!isset($node->path) || (isset($node->path['pathauto']) && empty($node->path['pathauto']))) {