[gnome-color-manager] trivial: When rescanning SANE, force it to drop the list of devices so we get the current list

[Richard Hughes <rhughes src gnome org>]

commit 8efcc5280e9d4d73e0da636424c274457722a3ab
Author: Richard Hughes <richard hughsie com>
Date:   Wed Mar 24 12:30:41 2010 +0000

    trivial: When rescanning SANE, force it to drop the list of devices so we get the current list

 src/gcm-client.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/src/gcm-client.c b/src/gcm-client.c
index dfec191..e7a366a 100644
--- a/src/gcm-client.c
+++ b/src/gcm-client.c
@@ -702,6 +702,10 @@ gcm_client_add_connected_devices_sane (GcmClient *client, GError **error)
 	SANE_Status status;
 	const SANE_Device **device_list;
 
+	/* force sane to drop it's cache of devices -- yes, it is that crap */
+	sane_exit ();
+	sane_init (NULL, NULL);
+
 	/* get scanners on the local server */
 	status = sane_get_devices (&device_list, FALSE);
 	if (status != SANE_STATUS_GOOD) {
@@ -709,6 +713,12 @@ gcm_client_add_connected_devices_sane (GcmClient *client, GError **error)
 		goto out;
 	}
 
+	/* nothing */
+	if (device_list == NULL || device_list[0] == NULL) {
+		egg_debug ("no devices to add");
+		goto out;
+	}
+
 	/* add them */
 	for (i=0; device_list[i] != NULL; i++)
 		gcm_client_sane_add (client, device_list[i]);