[gtk: 1/2] macos: fix scroll-unit build

[Matthias Clasen <matthiasc src gnome org>]

commit 3873861b2737160fda602bf0c15b02c4cfb8075b
Author: panoplie <59100-panoplie users noreply gitlab gnome org>
Date:   Sat Mar 19 02:55:02 2022 +0100

    macos: fix scroll-unit build

 gdk/macos/gdkmacosdisplay-translate.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/gdk/macos/gdkmacosdisplay-translate.c b/gdk/macos/gdkmacosdisplay-translate.c
index 9192bb2bd0..7767faef67 100644
--- a/gdk/macos/gdkmacosdisplay-translate.c
+++ b/gdk/macos/gdkmacosdisplay-translate.c
@@ -644,7 +644,8 @@ fill_scroll_event (GdkMacosDisplay *self,
                                  NULL,
                                  get_time_from_ns_event (nsevent),
                                  state,
-                                 0.0, 0.0, TRUE);
+                                 0.0, 0.0, TRUE,
+                                 GDK_SCROLL_UNIT_SURFACE);
 
   dx = [nsevent deltaX];
   dy = [nsevent deltaY];