[gcr] gcr-comparable: Fix documentation warning

[Stefan Walter <stefw src gnome org>]

commit 147646d1ab32902bdadb907c99ae5a3d1d35f92b
Author: Stef Walter <stefw gnome org>
Date:   Sun Jan 5 20:11:45 2014 +0100

    gcr-comparable: Fix documentation warning

 gcr/gcr-comparable.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gcr/gcr-comparable.c b/gcr/gcr-comparable.c
index ffefe4b..c378c28 100644
--- a/gcr/gcr-comparable.c
+++ b/gcr/gcr-comparable.c
@@ -43,6 +43,7 @@
 /**
  * GcrComparableIface:
  * @parent: type interface
+ * @compare: Compare whether tow objects represent the same thing.
  *
  * The interface to implement for #GcrComparable
  */