[gtk+] mir: invert scrolling delta

[Marco Trevisan <marcotrevi src gnome org>]

commit acfc4f891030d7339c221bdb57df9af8994fd6e0
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Sat Nov 15 17:35:07 2014 +0100

    mir: invert scrolling delta

 gdk/mir/gdkmireventsource.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gdk/mir/gdkmireventsource.c b/gdk/mir/gdkmireventsource.c
index e14df97..61ae346 100644
--- a/gdk/mir/gdkmireventsource.c
+++ b/gdk/mir/gdkmireventsource.c
@@ -162,8 +162,8 @@ generate_scroll_event (GdkWindow *window, gdouble x, gdouble y, gdouble delta_x,
   event->scroll.y = y;
   event->scroll.state = state;
   event->scroll.direction = GDK_SCROLL_SMOOTH;
-  event->scroll.delta_x = delta_x;
-  event->scroll.delta_y = delta_y;
+  event->scroll.delta_x = -delta_x;
+  event->scroll.delta_y = -delta_y;
 
   send_event (window, get_pointer (window), event);
 }