log: don't fail if a log descriptor is reopened

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

log.c

@@ -45,6 +45,9 @@ int log_init(const char *output)
 			return -1;
 		}
 
+		if (sfd == current_logfd)
+			close(sfd);
+
 		if (reopen_fd_as(sfd, new_logfd) < 0)
 			goto err;
 	} else {