ErikZalm/Marlin — pull request #531 by iXce (2013-06-28 12:22:40+00:00)
Title: Only clamp panel movements if software endstops are enabled

Currently the panel movements are limited by the software endstops, even though these might not be enabled, which can be very annoying, for instance if you don't have endstops (I have no Z endstop and I'm zeroing my Z axis by hand, but without this patch I have to power up a computer to be able to lower the Z axis below it's original position).