authhtpasswd : Check if the first char exists before testing it

git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@2560 bf3deb0d-5f1a-0410-827f-c0cc1f45334c

authhtpasswd.php

@@ -36,7 +36,7 @@ class authhtpasswd extends auth
     foreach ($lines as $line)
     {
       // Comment line : skip it
-      if ($line{0} === "#")
+      if (isset ($line{0}) && $line{0} === "#")
         continue;
       $line = trim ($line);
       $user = strstr ($line, ":", true);