[gthumb] added an explicit cast to avoid a warning

[Paolo Bacchilega <paobac src gnome org>]

commit 7ab43d8e20718a4109a254e50085224b90ba28fe
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sat Jul 3 15:50:07 2010 +0200

    added an explicit cast to avoid a warning

 gthumb/gth-main-default-tests.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gthumb/gth-main-default-tests.c b/gthumb/gth-main-default-tests.c
index de893ff..3104ef9 100644
--- a/gthumb/gth-main-default-tests.c
+++ b/gthumb/gth-main-default-tests.c
@@ -174,7 +174,7 @@ get_original_date_for_test (GthTest        *test,
 	GthMetadata *metadata;
 
 	datetime = gth_datetime_new ();
-	metadata = g_file_info_get_attribute_object (file_data->info, "Embedded::Photo::DateTimeOriginal");
+	metadata = (GthMetadata *) g_file_info_get_attribute_object (file_data->info, "Embedded::Photo::DateTimeOriginal");
 	if (metadata != NULL)
 		gth_datetime_from_exif_date (datetime, gth_metadata_get_raw (metadata));