bug #1690561 Blobs being cleared on Edit of row

ChangeLog

@@ -34,6 +34,7 @@ $HeadURL$
 2.10.0.3 (not released yet)
 =====================
 
+- bug #1690561 Blobs being cleared on Edit of row
 - bug #1679801 [core] XSS vulnerability in PMA_sanitize(), thanks to sp3x SecurityReason
 
 2.10.0.2 (2007-03-02)

libraries/tbl_replace_fields.inc.php

@@ -190,6 +190,8 @@ if (false === $valid_file_was_uploaded) {
                 if (! empty($prot_row[$key])) {
                     $val = '0x' . bin2hex($prot_row[$key]);
                     $seen_binary = true;
+                } else {
+                    $val = '';
                 }
 
                 break;