[aravis] buffer: don't return a value on a void function

[Emmanuel Pacaud <emmanuel src gnome org>]

commit 751e4250bc026f9d773ac5b69eaa9028224c3793
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Mon Nov 3 16:00:24 2014 +0100

    buffer: don't return a value on a void function

 src/arvbuffer.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/arvbuffer.c b/src/arvbuffer.c
index 34306b5..49684ae 100644
--- a/src/arvbuffer.c
+++ b/src/arvbuffer.c
@@ -351,8 +351,8 @@ arv_buffer_get_frame_id (ArvBuffer *buffer)
 void
 arv_buffer_get_image_region (ArvBuffer *buffer, gint *x, gint *y, gint *width, gint *height)
 {
-       g_return_val_if_fail (ARV_IS_BUFFER (buffer), 0);
-       g_return_val_if_fail (buffer->priv->gvsp_payload_type == ARV_GVSP_PAYLOAD_TYPE_IMAGE, 0);
+       g_return_if_fail (ARV_IS_BUFFER (buffer));
+       g_return_if_fail (buffer->priv->gvsp_payload_type == ARV_GVSP_PAYLOAD_TYPE_IMAGE);
 
        if (x != NULL)
                *x = buffer->priv->x_offset;