Kevin O'Connor d2abbd8f5d extruder: Fix retract
Commit 7554c7f6 broke retract moves.  Fix by making sure extrude_r is
always a positive number.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
2016-12-01 18:17:54 -05:00
..
2016-12-01 18:17:54 -05:00