init.d/root: don't remount swap

While refactoring the changes proposed in #533 a minor error was
introduced were the root service will now attempt to remount swap.
This will fail with the error message `mountinfo: 'swap' is not a
mountpoint`.

This fixes #546

init.d/root.in

@@ -48,8 +48,12 @@ start()
 	ebegin "Remounting filesystems"
 	local mountpoint
 	for mountpoint in $(fstabinfo); do
+		case "${mountpoint}" in
+			/*) # Don't remount swap etc.
 				mountinfo -q "${mountpoint}" && \
 					fstabinfo --remount "${mountpoint}"
+			;;
+		esac
 	done
 	eend 0
 }