[evolution-data-server/gnome-3-6] imapx_connect_to_server: Avoid a runtime warning.

[Matthew Barnes <mbarnes src gnome org>]

commit a91eef8360b5a018c5b57034f526508c4bf49e1e
Author: Matthew Barnes <mbarnes redhat com>
Date:   Sun Sep 30 07:50:26 2012 -0400

    imapx_connect_to_server: Avoid a runtime warning.
    
    Check that the IMAPX stream is non-NULL before unreferencing it during
    failure cleanup.
    
    (cherry picked from commit 19da4b91667003095871d771667fbcee0faa9959)

 camel/camel-imapx-server.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/camel/camel-imapx-server.c b/camel/camel-imapx-server.c
index bbffd3f..e595243 100644
--- a/camel/camel-imapx-server.c
+++ b/camel/camel-imapx-server.c
@@ -3523,8 +3523,10 @@ exit:
 	} else {
 		g_mutex_lock (&is->priv->stream_lock);
 
-		g_object_unref (is->priv->stream);
-		is->priv->stream = NULL;
+		if (is->priv->stream != NULL) {
+			g_object_unref (is->priv->stream);
+			is->priv->stream = NULL;
+		}
 
 		if (is->cinfo != NULL) {
 			imapx_free_capability (is->cinfo);