In hybrid_corexy and hybrid_corexz, the update_limits function is (only) called by the DualCarriage implementation, whenever the carriage changes.
Unfortunately, these limits also keep track of homing status, when they're unhomed they are set to 1 to -1 (invalid range).
As a fix, if the limit was set to "unhomed", we keep it that way, and only update it with the new rail limits if it was already properly homed before.
Signed-off-by: Frans-willem Hardijzer <fw@hardijzer.nl>
ec61f10f0f