[gtk: 1/2] doc: Fix there/their typo

[Timm Bäder <baedert src gnome org>]

commit a1a6e6a36ad2a4dd7916438ac71ab3637b443f46
Author: Alcaro <floating muncher se>
Date:   Fri Jul 27 02:28:45 2018 +0000

    doc: Fix there/their typo

 gtk/gtkenums.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkenums.h b/gtk/gtkenums.h
index 57ac101e5f..0dd737e418 100644
--- a/gtk/gtkenums.h
+++ b/gtk/gtkenums.h
@@ -464,7 +464,7 @@ typedef enum
  * Used to change the appearance of an outline typically provided by a #GtkFrame.
  *
  * Note that many themes do not differentiate the appearance of the
- * various shadow types: Either their is no visible shadow (@GTK_SHADOW_NONE),
+ * various shadow types: Either there is no visible shadow (@GTK_SHADOW_NONE),
  * or there is (any other value).
  */
 typedef enum