fix hex2bin for empty input

diff --git a/include/text.php b/include/text.php
index 299410a63d99b6f1860b0bca8ca482f286f5ea1b..ca8dc5ac3b474569b793a97e555cec979ae0378c 100644 (file)
--- 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);