[libhandy] search-bar: Correctly special-case the direct internal child

[Alexander Mikhaylenko <alexm src gnome org>]

commit d88cf2a672b8dcd412bc42b9323fc0846882694b
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sun Jun 7 14:01:28 2020 +0200

    search-bar: Correctly special-case the direct internal child
    
    The search bar contains a revealer, which itself contains the tool box,
    so to correctly check we are constructing the widget, we should look for
    the presence of the bar's direct child: the revealer, not the tool box.
    
    This also drop a fairly useless and wrong (column has no sense here)
    comment.

 src/hdy-search-bar.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)
---
diff --git a/src/hdy-search-bar.c b/src/hdy-search-bar.c
index 1c00c820..1d206f2d 100644
--- a/src/hdy-search-bar.c
+++ b/src/hdy-search-bar.c
@@ -335,12 +335,7 @@ hdy_search_bar_add (GtkContainer *container,
   HdySearchBar *self = HDY_SEARCH_BAR (container);
   HdySearchBarPrivate *priv = hdy_search_bar_get_instance_private (self);
 
-  /* When constructing the widget, we want the revealer to be added
-   * as the first child of the search bar, as an implementation detail.
-   * After that, the child added by the application should be added
-   * to column.
-   */
-  if (priv->tool_box == NULL) {
+  if (priv->revealer == NULL) {
     GTK_CONTAINER_CLASS (hdy_search_bar_parent_class)->add (container, child);
   } else {
     gtk_box_set_center_widget (GTK_BOX (priv->tool_box), child);