contact: silence warning checking missing client headers

Same behaviour but avoiding definedness error in logs.

diff --git a/widget/contact.php b/widget/contact.php
index b7e073fe40f72890260fcab2f448fd6ca1f3123a..a4fccda1a0ca8aead4f0b5f106653696cf05e043 100644 (file)
--- a/widget/contact.php
+++ b/widget/contact.php
@@ -58,7 +58,7 @@ switch ($source) {
                'X-Accept-Language' => 'HTTP_ACCEPT_LANGUAGE',
                'User-Agent'        => 'HTTP_USER_AGENT',
        ) as $mailhdr => $serverhdr) {
-               if (!$_SERVER[$serverhdr]) continue;
+               if (empty($_SERVER[$serverhdr])) continue;
                $header .= "\r\n$mailhdr: ".$_SERVER[$serverhdr];
        }