From e38baaa23e8bee189d4152c848451c44277b7c4c Mon Sep 17 00:00:00 2001
From: Scott Lahteine <sourcetree@thinkyhead.com>
Date: Mon, 25 Apr 2016 14:17:20 -0700
Subject: [PATCH] Fix an acceleration anomaly by making locals signed

---
 Marlin/planner.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Marlin/planner.cpp b/Marlin/planner.cpp
index e1ee240d8cc..f5062d2a7d9 100644
--- a/Marlin/planner.cpp
+++ b/Marlin/planner.cpp
@@ -941,7 +941,7 @@ float junction_deviation = 0.1;
 
   // Compute and limit the acceleration rate for the trapezoid generator.
   float steps_per_mm = block->step_event_count / block->millimeters;
-  unsigned long bsx = block->steps[X_AXIS], bsy = block->steps[Y_AXIS], bsz = block->steps[Z_AXIS], bse = block->steps[E_AXIS];
+  long bsx = block->steps[X_AXIS], bsy = block->steps[Y_AXIS], bsz = block->steps[Z_AXIS], bse = block->steps[E_AXIS];
   if (bsx == 0 && bsy == 0 && bsz == 0) {
     block->acceleration_st = ceil(retract_acceleration * steps_per_mm); // convert to: acceleration steps/sec^2
   }