[gtksourceview] view: fix type cast

[Christian Hergert <chergert src gnome org>]

commit e7f07e0f5c0eb8b519a7c621d7ccf9dea0157f56
Author: Christian Hergert <chergert redhat com>
Date:   Wed Aug 31 20:07:15 2022 -0700

    view: fix type cast

 gtksourceview/gtksourceview-assistants.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtksourceview/gtksourceview-assistants.c b/gtksourceview/gtksourceview-assistants.c
index 459c6fbf..72ab6ab0 100644
--- a/gtksourceview/gtksourceview-assistants.c
+++ b/gtksourceview/gtksourceview-assistants.c
@@ -129,7 +129,7 @@ _gtk_source_view_assistants_hide_all (GtkSourceViewAssistants *assistants)
 
                if (gtk_widget_get_visible (GTK_WIDGET (assistant)))
                {
-                       gtk_widget_hide (GTK_POPOVER (assistant));
+                       gtk_widget_hide (GTK_WIDGET (assistant));
                        ret = TRUE;
                }
        }