[mutter] clutter: return correct enum type

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit bcc519e4eee3bc6b38d8c0da527a7b14eed7e125
Author: Thomas Hindoe Paaboel Andersen <phomes gmail com>
Date:   Tue Nov 12 16:57:30 2019 +0100

    clutter: return correct enum type
    
    clutter_event_get_scroll_finish_flags() should return a ClutterScrollFinishFlags
    but due to what looks like a bad copy/paste it instead returns a
    ClutterScrollSource on asserts.
    
    The definitions of the enums are these:
    
    typedef enum
    {
      CLUTTER_SCROLL_SOURCE_UNKNOWN,
      CLUTTER_SCROLL_SOURCE_WHEEL,
      CLUTTER_SCROLL_SOURCE_FINGER,
      CLUTTER_SCROLL_SOURCE_CONTINUOUS
    } ClutterScrollSource;
    
    typedef enum
    {
      CLUTTER_SCROLL_FINISHED_NONE       = 0,
      CLUTTER_SCROLL_FINISHED_HORIZONTAL = 1 << 0,
      CLUTTER_SCROLL_FINISHED_VERTICAL   = 1 << 1
    } ClutterScrollFinishFlags;
    
    The asserts would only return CLUTTER_SCROLL_SOURCE_UNKNOWN. This
    is equal to CLUTTER_SCROLL_FINISHED_NONE which this patch uses
    instead. Thus no functional change is intended. This only fixes a
    compile warning.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/931

 clutter/clutter/clutter-event.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/clutter/clutter/clutter-event.c b/clutter/clutter/clutter-event.c
index 975ba5707..9ccc0da1c 100644
--- a/clutter/clutter/clutter-event.c
+++ b/clutter/clutter/clutter-event.c
@@ -2161,9 +2161,9 @@ clutter_event_get_scroll_source (const ClutterEvent *event)
 ClutterScrollFinishFlags
 clutter_event_get_scroll_finish_flags (const ClutterEvent *event)
 {
-  g_return_val_if_fail (event != NULL, CLUTTER_SCROLL_SOURCE_UNKNOWN);
+  g_return_val_if_fail (event != NULL, CLUTTER_SCROLL_FINISHED_NONE);
   g_return_val_if_fail (event->type == CLUTTER_SCROLL,
-                        CLUTTER_SCROLL_SOURCE_UNKNOWN);
+                        CLUTTER_SCROLL_FINISHED_NONE);
 
   return event->scroll.finish_flags;
 }