Description:
------------
When we try to convert an svg to jpg and this svg has references to remote files 


In standard comments that is possible use external references:

  http://www.zvon.org/xxl/svgReference/Standard1.1/struct.html


And if you try from console with convert works fine, but when try from php code using convert dont display the elements.

Software versions:
  CentOS release 5.4 (Final)
  2.6.24-19-xen #1 SMP Wed Aug 20 21:08:51 UTC 2008 x86_64 x86_64 x86_64 GNU/Linux
  ImageMagick2-6.5.5.6-1.el5.remi
  php-5.3.1-1.el5.remi
  php-pecl-imagick-2.3.0-2.el5.remi


Content in test.svg:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   version="1.1"
   width="210mm"
   height="297mm"
   id="svg2">
   <image width="600" height="302" id="map" x="0" y="0" xlink:href="http://pecl.php.net/gifs/peclsmall.gif" />
</svg>

I think that this guy has the same issue:

   http://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=15074


Reproduce code:
---------------
<?
 $im = new imagick();
 $im->readImage("test.svg");
 $im->cropThumbnailImage(150,100);
 $im->writeImage("test.jpg");
?>

Expected result:
----------------
Generate an image test.jpg that displays the pecl logo.
If you use convert from console works fine:

 convert test.svg test.jpg

Actual result:
--------------
[eladio@server ~]# php -q test.php 

Segmentation fault

----
With files that hasnt remote files returns the same error, but some conversion is done, because I can see elements.