[libsoup/content-sniffing] Fix soup_content_sniffer_sniff return value

[Gustavo Noronha Silva <gns src gnome org>]

commit 780e6618527232770cbbb779285d281c4d7c5d5a
Author: Gustavo Noronha Silva <gns gnome org>
Date:   Sat Jun 20 23:58:00 2009 -0300

    Fix soup_content_sniffer_sniff return value

 libsoup/soup-content-sniffer.c |    8 ++++----
 libsoup/soup-content-sniffer.h |    2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/libsoup/soup-content-sniffer.c b/libsoup/soup-content-sniffer.c
index 02b453b..e87f470 100644
--- a/libsoup/soup-content-sniffer.c
+++ b/libsoup/soup-content-sniffer.c
@@ -80,13 +80,13 @@ soup_content_sniffer_new ()
 	return g_object_new (SOUP_TYPE_CONTENT_SNIFFER, NULL);
 }
 
-void
+char *
 soup_content_sniffer_sniff (SoupContentSniffer *sniffer,
 			    SoupMessage *msg, SoupBuffer *buffer)
 {
-	g_return_if_fail (SOUP_IS_CONTENT_SNIFFER (sniffer));
-	g_return_if_fail (SOUP_IS_MESSAGE (msg));
-	g_return_if_fail (buffer != NULL);
+	g_return_val_if_fail (SOUP_IS_CONTENT_SNIFFER (sniffer), NULL);
+	g_return_val_if_fail (SOUP_IS_MESSAGE (msg), NULL);
+	g_return_val_if_fail (buffer != NULL, NULL);
 
 	return SOUP_CONTENT_SNIFFER_GET_CLASS (sniffer)->sniff (sniffer, msg, buffer);
 }
diff --git a/libsoup/soup-content-sniffer.h b/libsoup/soup-content-sniffer.h
index ad2116a..bfcc2e8 100644
--- a/libsoup/soup-content-sniffer.h
+++ b/libsoup/soup-content-sniffer.h
@@ -46,7 +46,7 @@ GType               soup_content_sniffer_get_type (void);
 
 SoupContentSniffer *soup_content_sniffer_new      (void);
 
-void                soup_content_sniffer_sniff    (SoupContentSniffer *sniffer,
+char               *soup_content_sniffer_sniff    (SoupContentSniffer *sniffer,
 						   SoupMessage *msg,
 						   SoupBuffer *buffer);