[gtk/matthiasc/for-master: 4/6] columnview: Plug listmodel memory leaks

[Matthias Clasen <matthiasc src gnome org>]

commit 6079033cde3914a01d2c5849dcc1bb428f3a287c
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Nov 10 09:07:22 2020 -0500

    columnview: Plug listmodel memory leaks
    
    We were leaking references returned from g_list_model_get_item
    in some places.

 gtk/gtkcolumnview.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkcolumnview.c b/gtk/gtkcolumnview.c
index d39b50e875..afa5150269 100644
--- a/gtk/gtkcolumnview.c
+++ b/gtk/gtkcolumnview.c
@@ -983,6 +983,8 @@ header_drag_begin (GtkGestureDrag *gesture,
 
           break;
         }
+
+      g_object_unref (column);
     }
 
   for (i = 0; !self->in_column_resize && i < n; i++)
@@ -1049,7 +1051,10 @@ header_drag_end (GtkGestureDrag *gesture,
 
       sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
       if (!gtk_gesture_handles_sequence (GTK_GESTURE (gesture), sequence))
-        return;
+        {
+          g_object_unref (column);
+          return;
+        }
 
       for (i = 0; i < g_list_model_get_n_items (G_LIST_MODEL (self->columns)); i++)
         {
@@ -1531,7 +1536,6 @@ gtk_column_view_remove_column (GtkColumnView       *self,
       g_object_unref (item);
       if (item == column)
         break;
-
     }
 
   gtk_column_view_sorter_remove_column (GTK_COLUMN_VIEW_SORTER (self->sorter), column);