Fix delta_mm.e with zero extruders #15996
Merged
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Description
With 0 extruders the uninitialised
delta_mm.e
was used in some calculations which in rare cases could lead to amax_rate
of 0. WithADAPTIVE_STEP_SMOOTHING
enabled the silent error becomes obvious by freezing the board.Related Issues
A comment by @MitchelBerberich on #15865