Silence some warnings about "Invalid argument supplied for foreach()"

mail/inc/class.mail_compose.inc.php

@@ -1368,7 +1368,7 @@ class mail_compose
 		}
 
 		// set filemode icons for all attachments
-		foreach($content['attachments'] as &$attach)
+		foreach((array)$content['attachments'] as &$attach)
 		{
 			$attach['is_dir'] = is_dir($attach['file']);
 			$attach['filemode_icon'] = !is_dir($attach['file']) &&

mail/inc/class.mail_ui.inc.php

@@ -1614,6 +1614,7 @@ $filter['range'] = "BETWEEN";// we support SINCE, BEFORE, BETWEEN and ON
 $filter['since'] = date("d-M-Y", $cutoffdate);
 $filter['before']= date("d-M-Y", $cutoffdate2);
 */
+		$sR = array();
 		try
 		{
 			if ($maxMessages > 75)