Manual relationships broken

I'm working on this as part of the external tables integration. The problem was that I got an SQL error in views of external tables that were using manual relationships. If you looked at the SQL generated, you would see a " .vid" in the join instead of "ext_node.vid", like the table name went missing. I ended up tracking it down to the relationship handler. It was assigning the table alias to the left table, instead of the actual table name.

-    $def['left_table'] = $this->table_alias;
+    $def['left_table'] = $this->table;

Because it had an alias, not the actual table name, the get_table_info call in the views_query class failed, leaving $left empty, so that only " .$this->left_field" was output to the query.

$left = $query->get_table_info($this->left_table);
$left_field = "$left[alias].$this->left_field";

After the change, the query works correctly. Note: I've only tested this change for external tables, but I would think it would effect any internal table that happened to have an alias different then the actual table name.