[PATCH synaptics] Fix coasting speed

[Pierre Lulé]

Fixes a bug introduced in commit 2603ad69b997c999404ecc441e0d64ea2cc22018 (Use the scroll distances as increment for scrolling valuator axes)

Since this commit, scroll distance was set with SetScrollValuator function but it was still used as a divisor to calculate coasting,
thus making coasting too slow. (at least on my computer)

Deleting the divisor fixes the issue.

A report of the same bug : https://bugs.archlinux.org/task/28955

Signed-off-by: Pierre Lulé <pierre at lule.fr>
---
 src/synaptics.c |   19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/src/synaptics.c b/src/synaptics.c
index 99b5085..32d4682 100644
--- a/src/synaptics.c
+++ b/src/synaptics.c
@@ -2330,39 +2330,36 @@ start_coasting(SynapticsPrivate *priv, struct SynapticsHwState *hw,
 	double pkt_time = HIST_DELTA(0, 3, millis) / 1000.0;
 	if (vert && !circ) {
 	    double dy = estimate_delta(HIST(0).y, HIST(1).y, HIST(2).y, HIST(3).y);
-	    int sdelta = para->scroll_dist_vert;
-	    if (pkt_time > 0 && sdelta > 0) {
-		double scrolls_per_sec = dy / pkt_time / sdelta;
+	    if (pkt_time > 0) {
+		double scrolls_per_sec = dy / pkt_time;
 		if (fabs(scrolls_per_sec) >= para->coasting_speed) {
 		    priv->scroll.coast_speed_y = scrolls_per_sec;
-		    priv->scroll.coast_delta_y = (hw->y - priv->scroll.last_y) / (double)sdelta;
+		    priv->scroll.coast_delta_y = (hw->y - priv->scroll.last_y);
 		}
 	    }
 	}
 	if (horiz && !circ){
 	    double dx = estimate_delta(HIST(0).x, HIST(1).x, HIST(2).x, HIST(3).x);
-	    int sdelta = para->scroll_dist_horiz;
 	    if (pkt_time > 0 && sdelta > 0) {
-		double scrolls_per_sec = dx / pkt_time / sdelta;
+		double scrolls_per_sec = dx / pkt_time;
 		if (fabs(scrolls_per_sec) >= para->coasting_speed) {
 		    priv->scroll.coast_speed_x = scrolls_per_sec;
-		    priv->scroll.coast_delta_x = (hw->x - priv->scroll.last_x) / (double)sdelta;
+		    priv->scroll.coast_delta_x = (hw->x - priv->scroll.last_x);
 		}
 	    }
 	}
 	if (circ) {
 	    double da = estimate_delta_circ(priv);
-	    double sdelta = para->scroll_dist_circ;
 	    if (pkt_time > 0 && sdelta > 0) {
-	        double scrolls_per_sec = da / pkt_time / sdelta;
+	        double scrolls_per_sec = da / pkt_time;
 	        if (fabs(scrolls_per_sec) >= para->coasting_speed) {
 	            if (vert) {
 	                priv->scroll.coast_speed_y = scrolls_per_sec;
-	                priv->scroll.coast_delta_y = diffa(priv->scroll.last_a, angle(priv, hw->x, hw->y)) / sdelta;
+	                priv->scroll.coast_delta_y = diffa(priv->scroll.last_a, angle(priv, hw->x, hw->y));
 	            }
 	            else if (horiz) {
 	                priv->scroll.coast_speed_x = scrolls_per_sec;
-	                priv->scroll.coast_delta_x = diffa(priv->scroll.last_a, angle(priv, hw->x, hw->y)) / sdelta;
+	                priv->scroll.coast_delta_x = diffa(priv->scroll.last_a, angle(priv, hw->x, hw->y));
 	            }
 	        }
 	    }
-- 
1.7.9.4