Slightly improved docs in atktext.c

diff --git a/atk/atktext.c b/atk/atktext.c
index e509dd3..78d2961 100755 (executable)
--- a/atk/atktext.c
+++ b/atk/atktext.c
@@ -260,7 +260,8 @@ atk_text_get_text_before_offset (AtkText          *text,
  *
  * Gets the offset position of the caret (cursor).
  *
- * Returns: the offset position of the caret (cursor).
+ * Returns: the offset position of the caret (cursor), or -1 if
+ *    one does not exist (or is not supported by the widget).
  **/
 gint
 atk_text_get_caret_offset (AtkText *text)