compositor-x11: send pointer frame after axis event

clients that implement pointer interface of version 5
wait for the frame event, so without it the scrolling
does not work (GTK+ clients do not scroll now for example).
Xcb axis events are discrete, so it's fine to send
frame after every single axis event

Signed-off-by: Marek Chalupa <mchqwerty@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>

src/compositor-x11.c

@@ -1092,6 +1092,7 @@ x11_backend_deliver_button_event(struct x11_backend *b,
 			notify_axis(&b->core_seat,
 				    weston_compositor_get_time(),
 				    &weston_event);
+			notify_pointer_frame(&b->core_seat);
 		}
 		return;
 	case 5:
@@ -1104,6 +1105,7 @@ x11_backend_deliver_button_event(struct x11_backend *b,
 			notify_axis(&b->core_seat,
 				    weston_compositor_get_time(),
 				    &weston_event);
+			notify_pointer_frame(&b->core_seat);
 		}
 		return;
 	case 6:
@@ -1116,6 +1118,7 @@ x11_backend_deliver_button_event(struct x11_backend *b,
 			notify_axis(&b->core_seat,
 				    weston_compositor_get_time(),
 				    &weston_event);
+			notify_pointer_frame(&b->core_seat);
 		}
 		return;
 	case 7:
@@ -1128,6 +1131,7 @@ x11_backend_deliver_button_event(struct x11_backend *b,
 			notify_axis(&b->core_seat,
 				    weston_compositor_get_time(),
 				    &weston_event);
+			notify_pointer_frame(&b->core_seat);
 		}
 		return;
 	default: