[gtk+] headerbar: fix "widow" typo in docs

[Will Thompson <wjt src gnome org>]

commit 176bc32950a1e364b22de2a7d4386996b5fcaca1
Author: Will Thompson <wjt endlessm com>
Date:   Thu Jun 15 15:53:18 2017 +0100

    headerbar: fix "widow" typo in docs

 gtk/gtkheaderbar.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkheaderbar.c b/gtk/gtkheaderbar.c
index 9aa401f..eb570a6 100644
--- a/gtk/gtkheaderbar.c
+++ b/gtk/gtkheaderbar.c
@@ -2171,7 +2171,7 @@ gtk_header_bar_get_show_close_button (GtkHeaderBar *bar)
 /**
  * gtk_header_bar_set_show_close_button:
  * @bar: a #GtkHeaderBar
- * @setting: %TRUE to show standard widow decorations
+ * @setting: %TRUE to show standard window decorations
  *
  * Sets whether this header bar shows the standard window decorations,
  * including close, maximize, and minimize.