master d0ea2a8: Fix scroll wheel reporting on NS

[Po Lu]

branch: master
commit d0ea2a87f4d7a1afbe959fe53099222e120e8858
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Fix scroll wheel reporting on NS
    
    * src/nsterm.m (- mouseDown): Clear scroll wheel
    accumulators.
---
 src/nsterm.m | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/nsterm.m b/src/nsterm.m
index 17f5b98..80117a4 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -6604,7 +6604,10 @@ not_in_argv (NSString *arg)
 
                   lines = abs (totalDeltaX / lineHeight);
                  x = totalDeltaX;
-                 totalDeltaX = totalDeltaX % lineHeight;
+                 if (!x_coalesce_scroll_events)
+                   totalDeltaX = 0;
+                 else
+                   totalDeltaX = totalDeltaX % lineHeight;
                   totalDeltaY = 0;
                 }
               else if (abs (totalDeltaY) >= abs (totalDeltaX)
@@ -6616,7 +6619,10 @@ not_in_argv (NSString *arg)
 
                   lines = abs (totalDeltaY / lineHeight);
                  y = totalDeltaY;
-                  totalDeltaY = totalDeltaY % lineHeight;
+                 if (!x_coalesce_scroll_events)
+                   totalDeltaY = 0;
+                 else
+                   totalDeltaY = totalDeltaY % lineHeight;
                   totalDeltaX = 0;
                 }