fix test

Author: devnexen

ext/sockets/tests/mcast_sockettype_error.phpt

@@ -4,8 +4,12 @@ Multicast attempt on unsupported socket type
 sockets
 --FILE--
 <?php
+$sock_path = sprintf("/tmp/%s.sock", uniqid());
+
+if (file_exists($sock_path))
+	die('Temporary socket already exists.');
 $sock = socket_create(AF_UNIX, SOCK_DGRAM, 0);
-socket_bind($sock, '0.0.0.0', 0);
+socket_bind($sock, $sock_path);
 
 try {
     socket_set_option($sock, IPPROTO_IP, MCAST_JOIN_GROUP, array(