From d1833cabf67b35a10a676d69a1e45fe7aadc31bc Mon Sep 17 00:00:00 2001
From: Friendika <info@friendika.com>
Date: Thu, 20 Oct 2011 19:11:34 -0700
Subject: [PATCH] fix hex2bin for empty input

---
 include/text.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/text.php b/include/text.php
index 299410a63d..ca8dc5ac3b 100644
--- a/include/text.php
+++ b/include/text.php
@@ -195,6 +195,9 @@ function unxmlify($s) {
 
 if(! function_exists('hex2bin')) {
 function hex2bin($s) {
+	if(! (is_string($s) && strlen($s)))
+		return '';
+
 	if(! ctype_xdigit($s)) {
 		logger('hex2bin: illegal input: ' . print_r(debug_backtrace(), true));
 		return($s);