Eo: fix double callback deletion

Scenario:
- Same signal/function/data registered twice on e.g mouse_down
- On mouse_down, register mouse_move and mouse_up
- On mouse_up, unregister mouse_move

Result: mouse_move still invoked after mouse_up

Reason:
- When the mouse_move callback deletion is required, the cb is
flagged as deleted but is not freed as walking_list blocks.
- When the second (and same) has to be deleted, it will try to delete
the first again because the delete_me flag is not checked.

This patch fixes it by checking the delete_me flag when determining the
candidate.

@fix

src/lib/eo/eo_base_class.c

@@ -576,8 +576,8 @@ _eo_base_event_callback_del(Eo *obj, Eo_Base_Data *pd,
 
    for (cb = pd->callbacks; cb; cb = cb->next)
      {
-        if ((cb->items.item.desc == desc) && (cb->items.item.func == func) &&
-              (cb->func_data == user_data))
+        if (!cb->delete_me && (cb->items.item.desc == desc) &&
+              (cb->items.item.func == func) && (cb->func_data == user_data))
           {
              const Eo_Callback_Array_Item arr[] = { {desc, func}, {NULL, NULL}};
 
@@ -622,7 +622,8 @@ _eo_base_event_callback_array_del(Eo *obj, Eo_Base_Data *pd,
 
    for (cb = pd->callbacks; cb; cb = cb->next)
      {
-        if ((cb->items.item_array == array) && (cb->func_data == user_data))
+        if (!cb->delete_me &&
+              (cb->items.item_array == array) && (cb->func_data == user_data))
           {
              cb->delete_me = EINA_TRUE;
              pd->deletions_waiting = EINA_TRUE;