Description:
------------
segfault when requesting 2 or more FTP urls with curl_multi_*

Appears both under WIN XP SP3, ubuntu 8.10, 9.10

segfault when calling test script from command line, for example: 
d:/www4/php5/php -q -c d:/www4/php.ini -f curl_ftp_bug_test.php
and also as apache2 module:
http://localhost/curl_ftp_bug_test.php

php.ini used is default from distribution (php.ini-production) wit only curl extension enabled:
extension=php_curl.dll

Reproduced every time when call test script.

This bug first reported here:
http://bugs.php.net/bug.php?id=52284
But was set to "Bogus" by mistake.

Test script:
---------------
<?php
function multi_request($urls, $url_options = array()) {
	$mh = curl_multi_init();
	foreach ($urls as $id => $url) {
		$curly[$id] = curl_init();
		curl_setopt($curly[$id], CURLOPT_URL, $url);
		curl_setopt($curly[$id], CURLOPT_RETURNTRANSFER, true);
		// I've add this opt to speed up request, bug appearing with or without this line
		curl_setopt($curly[$id], CURLOPT_NOBODY, true);
		curl_multi_add_handle($mh, $curly[$id]);
	}

	$running = null;
	do {
		$status = curl_multi_exec($mh, $running);
		usleep(1000);
	} while($status == CURLM_CALL_MULTI_PERFORM || $running);

	foreach ($curly as $id => $c) {
		$result[$id] = curl_multi_getcontent($c);
		curl_multi_remove_handle($mh, $c);
		curl_close($c);
	}
	curl_multi_close($mh);

	return $result;
}

$urls = array(
	"4358521"	=> "ftp://ftp.ea.com/pub/ea/patches/nfs-underground/pc/en-uk/NFSU_EUROPE_PATCH_4.exe",
	"7458288"	=> "ftp://ftp.nero.com/software/plugins/WMAPlugin20937.exe",
);

echo "<pre>";
print_R(multi_request($urls));
echo "</pre>";


Expected result:
----------------
No segfault :)

Actual result:
--------------
segmentation fault