Avoid warnings; silently pipe http: urls through rcmail::url()

program/include/rcmail.php

@@ -726,8 +726,12 @@ class rcmail extends rcube
    */
   public function url($p)
   {
-    if (!is_array($p))
+    if (!is_array($p)) {
+      if (strpos($p, 'http') === 0)
+        return $p;
+
       $p = array('_action' => @func_get_arg(0));
+    }
 
     $task = $p['_task'] ? $p['_task'] : ($p['task'] ? $p['task'] : $this->task);
     $p['_task'] = $task;

program/include/rcube_addressbook.php

@@ -422,7 +422,7 @@ abstract class rcube_addressbook
     function get_col_values($col, $data, $flat = false)
     {
         $out = array();
-        foreach ($data as $c => $values) {
+        foreach ((array)$data as $c => $values) {
             if ($c === $col || strpos($c, $col.':') === 0) {
                 if ($flat) {
                     $out = array_merge($out, (array)$values);