Leak of struct addrinfo in xmlNanoFTPConnect()

For https://bugzilla.gnome.org/show_bug.cgi?id=732352

in case of error condition in IPv6 support, the early return here
doesn't call freeaddrinfo(result), thus leaking memory.

nanoftp.c

@@ -908,6 +908,8 @@ xmlNanoFTPConnect(void *ctx) {
 	    return (-1);
 	}
 	if (tmp->ai_addrlen > sizeof(ctxt->ftpAddr)) {
+	    if (result)
+		freeaddrinfo (result);
 	    __xmlIOErr(XML_FROM_FTP, 0, "gethostbyname address mismatch");
 	    return (-1);
 	}