macos: fix typo when creating scroll events

This fixes an issue where we would ignore events with Y delta
and no X delta while scrolling due to a typo when checking for
any delta.

This fixes deceleration of kinetic scrolling on the macOS backend.

Fixes #3418

diff --git a/gdk/macos/gdkmacosdisplay-translate.c b/gdk/macos/gdkmacosdisplay-translate.c
index f895db9686d1b07de3186dc7e100caaeb2c431cf..5f5eeffdcfb3afc1cf2dc524cc19780299a4e2e8 100644 (file)
--- a/gdk/macos/gdkmacosdisplay-translate.c
+++ b/gdk/macos/gdkmacosdisplay-translate.c
@@ -610,7 +610,7 @@ fill_scroll_event (GdkMacosDisplay *self,
       sx = [nsevent scrollingDeltaX];
       sy = [nsevent scrollingDeltaY];
 
-      if (sx != 0.0 || dx != 0.0)
+      if (sx != 0.0 || sy != 0.0)
         ret = gdk_scroll_event_new (GDK_SURFACE (surface),
                                     pointer,
                                     NULL,