Re-introduce removed GestureAction method

The get_threshold_tigger_egde() method was renamed to fix the typo, but
it obviously broke the ABI. To be fair, nobody in the whole of Debian
was using the symbol, apparently, so it's not like we broke existing
code. Still, it's not nice to break ABI without bumping soname, so let's
put the old symbol back in — obviously, deprecated — as a wrapper to the
newly added one.

clutter/clutter-gesture-action.c

@@ -1270,7 +1270,7 @@ clutter_gesture_action_set_threshold_trigger_edge (ClutterGestureAction      *ac
  *
  * Return value: the edge trigger
  *
- * Since: 1.18
+ * Since: 1.20
  */
 ClutterGestureTriggerEdge
 clutter_gesture_action_get_threshold_trigger_edge (ClutterGestureAction *action)
@@ -1281,6 +1281,25 @@ clutter_gesture_action_get_threshold_trigger_edge (ClutterGestureAction *action)
   return action->priv->edge;
 }
 
+/**
+ * clutter_gesture_action_get_threshold_trigger_egde:
+ * @action: a #ClutterGestureAction
+ *
+ * Retrieves the edge trigger of the gesture @action, as set using
+ * clutter_gesture_action_set_threshold_trigger_edge().
+ *
+ * Return value: the edge trigger
+ *
+ * Since: 1.18
+ *
+ * Deprecated: 1.20: Use clutter_gesture_action_get_threshold_trigger_edge() instead.
+ */
+ClutterGestureTriggerEdge
+clutter_gesture_action_get_threshold_trigger_egde (ClutterGestureAction *action)
+{
+  return clutter_gesture_action_get_threshold_trigger_edge (action);
+}
+
 /**
  * clutter_gesture_action_set_threshold_trigger_distance:
  * @action: a #ClutterGestureAction

clutter/clutter-gesture-action.h

@@ -159,7 +159,9 @@ void                   clutter_gesture_action_cancel               (ClutterGestu
 CLUTTER_AVAILABLE_IN_1_18
 void                            clutter_gesture_action_set_threshold_trigger_edge       (ClutterGestureAction      *action,
                                                                                          ClutterGestureTriggerEdge  edge);
-CLUTTER_AVAILABLE_IN_1_18
+CLUTTER_DEPRECATED_IN_1_20_FOR(clutter_gesture_action_get_threshold_trigger_edge)
+ClutterGestureTriggerEdge       clutter_gesture_action_get_threshold_trigger_egde       (ClutterGestureAction      *action);
+CLUTTER_AVAILABLE_IN_1_20
 ClutterGestureTriggerEdge       clutter_gesture_action_get_threshold_trigger_edge       (ClutterGestureAction      *action);
 
 CLUTTER_AVAILABLE_IN_1_18

doc/reference/clutter/clutter-sections.txt

@@ -3019,6 +3019,7 @@ CLUTTER_TYPE_GESTURE_ACTION
 <SUBSECTION Private>
 ClutterGestureActionPrivate
 clutter_gesture_action_get_type
+clutter_gesture_action_get_threshold_trigger_egde
 </SECTION>
 
 <SECTION>