[gtk+] typo fix

[Matthias Clasen <matthiasc src gnome org>]

commit a6d575ed61e707637cbbb3fd4b5b089020438cc3
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Mar 11 12:29:51 2016 -0500

    typo fix

 gtk/gtktreemodel.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtktreemodel.c b/gtk/gtktreemodel.c
index d919f58..5e447b9 100644
--- a/gtk/gtktreemodel.c
+++ b/gtk/gtktreemodel.c
@@ -1520,7 +1520,7 @@ gtk_tree_model_iter_previous (GtkTreeModel *tree_model,
  * If @parent is %NULL returns the first node, equivalent to
  * `gtk_tree_model_get_iter_first (tree_model, iter);`
  *
- * Returns: %TRUE, if @child has been set to the first child
+ * Returns: %TRUE, if @iter has been set to the first child
  */
 gboolean
 gtk_tree_model_iter_children (GtkTreeModel *tree_model,