Add missing rollback to LocalFile::recordUpload2

When begin was called, all returns should have rollback called to
close the transaction.

Change-Id: I8197f73fb45c2e2900db6d5e588623f9b0c46ea5

includes/filerepo/file/LocalFile.php

@@ -1268,6 +1268,7 @@ class LocalFile extends File {
 		# Fail now if the file isn't there
 		if ( !$this->fileExists ) {
 			wfDebug( __METHOD__ . ": File " . $this->getRel() . " went missing!\n" );
+			$dbw->rollback( __METHOD__ );
 			wfProfileOut( __METHOD__ );
 
 			return false;