[goffice] Fixed doc typo.

[Jean BrÃfort <jbrefort src gnome org>]

commit 32f615e53fd1c432252d8a4b140cc009619934eb
Author: Jean Brefort <jean brefort normalesup org>
Date:   Tue Oct 9 14:17:43 2012 +0200

    Fixed doc typo.

 goffice/app/go-doc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/goffice/app/go-doc.c b/goffice/app/go-doc.c
index 188ac27..49040ec 100644
--- a/goffice/app/go-doc.c
+++ b/goffice/app/go-doc.c
@@ -41,7 +41,7 @@ struct _GODocPrivate {
  * @uri: URI.
  * @meta_data: metadata.
  * @modified: whether the document has been modified.
- * @first_modification_time: date of the firs modification.
+ * @first_modification_time: date of the first modification.
  * @pristine: whether the document is unchanged since it was created.
  * @images: images used inside the document.
 **/