Description:
------------
Echoes "Segmentation fault" when trying to get colorspace information of 
grayscale jpg image. The image is as attachment (patch).

php -version:
PHP 5.3.3 (cli) (built: Feb 22 2013 02:51:11) 
Copyright (c) 1997-2010 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies

pecl list:
Installed packages, channel pecl.php.net:
=========================================
Package    Version State
geoip      1.0.8   stable
imagick    3.0.1   stable
intl       2.0.1   stable
mailparse  2.1.5   stable
stats      1.0.3   stable
timezonedb 2013.1  stable
translit   0.6.1   beta


Test script:
---------------
<?php
$file="pu_varitys_487_icc_standard_no_profile_gray.jpg";
$image = new Imagick();
try
{
  $image->pingImage($file);
  $image_info = $image->identifyImage();
  echo $image_info["colorSpace"]."\n";
}
catch(ImagickException $e)
{
    echo "error!";
}
?>


Expected result:
----------------
Should echo "Gray".

Actual result:
--------------
/var/log/messages:
kernel: php[19276]: segfault at 177d004 ip 00007fec01c8b4d0 sp 00007fffdae9ef40 
error 4 in libMagickCore.so.2.0.0[7fec01b72000+1ce000]