[libgda] Doc. improvements

[Vivien Malerba <vivien src gnome org>]

commit b9fafb6a6242b63953b8873cb487062650d5cc19
Author: Vivien Malerba <malerba gnome-db org>
Date:   Fri Apr 19 21:59:29 2013 +0200

    Doc. improvements

 libgda/thread-wrapper/gda-thread-wrapper.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/libgda/thread-wrapper/gda-thread-wrapper.c b/libgda/thread-wrapper/gda-thread-wrapper.c
index d66026b..a368bfa 100644
--- a/libgda/thread-wrapper/gda-thread-wrapper.c
+++ b/libgda/thread-wrapper/gda-thread-wrapper.c
@@ -1055,6 +1055,8 @@ gda_thread_wrapper_execute (GdaThreadWrapper *wrapper, GdaThreadWrapperFunc func
  * Once @func's execution is finished, if @arg is not %NULL, the @arg_destroy_func destruction function is 
called
  * on @arg. This call occurs in the thread calling gda_thread_wrapper_fetch_result().
  *
+ * If an error occurred in this function, then the @arg_destroy_func function is not called to free @arg.
+ *
  * Returns: the job ID, or 0 if an error occurred
  *
  * Since: 4.2