[evolution-data-server] CamelIMAPXServer: Avoid crashing in cancel_all_jobs().

[Matthew Barnes <mbarnes src gnome org>]

commit 132b32693210b8173c591d9c8c80efc798f8bfbb
Author: Matthew Barnes <mbarnes redhat com>
Date:   Wed Mar 7 13:23:50 2012 -0500

    CamelIMAPXServer: Avoid crashing in cancel_all_jobs().
    
    This is a workaround.  I don't know why some CamelIMAPXCommands are bad.

 camel/providers/imapx/camel-imapx-server.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/camel/providers/imapx/camel-imapx-server.c b/camel/providers/imapx/camel-imapx-server.c
index e0be69e..eb50101 100644
--- a/camel/providers/imapx/camel-imapx-server.c
+++ b/camel/providers/imapx/camel-imapx-server.c
@@ -5094,6 +5094,12 @@ cancel_all_jobs (CamelIMAPXServer *is,
 	for (link = head; link != NULL; link = g_list_next (link)) {
 		CamelIMAPXCommand *ic = link->data;
 
+		/* Sanity check the CamelIMAPXCommand before proceeding.
+		 * XXX We are actually getting reports of crashes here...
+		 *     not sure how this is happening but it's happening. */
+		if (ic == NULL || ic->job == NULL)
+			continue;
+
 		if (ic->job->error == NULL)
 			ic->job->error = g_error_copy (error);