[gtk+] Fix a doc comment typo

[Matthias Clasen <matthiasc src gnome org>]

commit 0f851be3681553897b6965f4562767ae61860b9d
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Aug 9 23:31:36 2015 +0200

    Fix a doc comment typo

 gtk/gtkstack.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkstack.c b/gtk/gtkstack.c
index ce5486c..29beb12 100644
--- a/gtk/gtkstack.c
+++ b/gtk/gtkstack.c
@@ -1646,7 +1646,7 @@ gtk_stack_get_transition_running (GtkStack *stack)
 /**
  * gtk_stack_set_interpolate_size:
  * @stack: A #GtkStack
- * @interpole_size: the new value
+ * @interpolate_size: the new value
  *
  * Sets whether or not @stack will interpolate its size when
  * changing the visible child. If the interpolate-size property