Duplicate file check missing

If you attempt to add a duplicate url, a sql exception is thrown. See below:

SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'oembed://...' for key 'uri': INSERT INTO {file_managed} (uid, filename, uri, filemime, filesize, status, timestamp, type) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, [error]
:db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7);

The expected behavior would be to check if the file already exists before attempting to add again.

This can be accomplished by sending TRUE to function file_uri_to_object on line 854 of oembed.module as shown below:

$file = file_uri_to_object($uri, TRUE);