Add missing ownership transfer annotations

gtk/gtkdropcontrollermotion.c

@@ -367,7 +367,8 @@ gtk_drop_controller_motion_contains_pointer (GtkDropControllerMotion *self)
  *
  * Returns the value of the GtkDropControllerMotion:drop property.
  *
- * Returns: The #GdkDrop currently happening within @self or %NULL if none
+ * Returns: (transfer none) (nullable): The #GdkDrop currently happening
+ *   within @self or %NULL if none
  */
 GdkDrop *
 gtk_drop_controller_motion_get_drop (GtkDropControllerMotion *self)

gtk/gtkicontheme.c

@@ -1459,9 +1459,9 @@ gtk_icon_theme_set_search_path (GtkIconTheme       *self,
  *
  * Gets the current search path. See gtk_icon_theme_set_search_path().
  * 
- * Returns: (element-type filename):
- *     a list of icon theme path directories or %NULL.
- *     The returned value should be freed with g_strfreev().
+ * Returns: (transfer full) (array zero-terminated=1) (element-type filename) (nullable):
+ *   a list of icon theme path directories or %NULL.
+ *   The returned value should be freed with g_strfreev().
  */
 char **
 gtk_icon_theme_get_search_path (GtkIconTheme  *self)
@@ -1552,8 +1552,9 @@ gtk_icon_theme_set_resource_path (GtkIconTheme       *self,
  *
  * See gtk_icon_theme_set_resource_path().
  * 
- * Returns: A list of resource paths or %NULL.
- *     The returned value should be freed with g_strfreev().
+ * Returns: (transfer full) (array zero-terminated=1) (element-type utf8) (nullable):
+ *   A list of resource paths or %NULL.
+ *   The returned value should be freed with g_strfreev().
  */
 char **
 gtk_icon_theme_get_resource_path (GtkIconTheme  *self)

gtk/gtktreednd.c

@@ -260,8 +260,8 @@ G_DEFINE_BOXED_TYPE (GtkTreeRowData, gtk_tree_row_data,
  * 
  * Creates a content provider for dragging @path from @tree_model.
  * 
- * Returns: a new #GdkContentProvider
- **/
+ * Returns: (transfer full): a new #GdkContentProvider
+ */
 GdkContentProvider *
 gtk_tree_create_row_drag_content (GtkTreeModel *tree_model,
 			          GtkTreePath  *path)