[virt-tools-list] [virt-viewer] spice: avoid crashing when using multi-seat

[Fabiano Fidêncio]

As multi-seat configuration is not supported by spice, the best we can
do for now is avoid crashing on this setup.

Resolves: rhbz#1250820

Signed-off-by: Fabiano Fidêncio <fidencio at redhat.com>
---
 src/virt-viewer-session-spice.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/virt-viewer-session-spice.c b/src/virt-viewer-session-spice.c
index dc0c1ff..a3014a8 100644
--- a/src/virt-viewer-session-spice.c
+++ b/src/virt-viewer-session-spice.c
@@ -836,8 +836,11 @@ static void
 destroy_display(gpointer data)
 {
     VirtViewerDisplay *display = VIRT_VIEWER_DISPLAY(data);
-    VirtViewerSession *session = virt_viewer_display_get_session(display);
+    VirtViewerSession *session;
 
+    g_return_if_fail (display != NULL);
+
+    session = virt_viewer_display_get_session(display);
     g_debug("Destroying spice display %p", display);
     virt_viewer_session_remove_display(session, display);
     g_object_unref(display);
@@ -886,6 +889,9 @@ virt_viewer_session_spice_display_monitors(SpiceChannel *channel,
         display = g_ptr_array_index(displays, i);
         if (display == NULL) {
             display = virt_viewer_display_spice_new(self, channel, i);
+            if (display == NULL)
+                continue;
+
             g_debug("creating spice display (#:%d)",
                     virt_viewer_display_get_nth(VIRT_VIEWER_DISPLAY(display)));
             g_ptr_array_index(displays, i) = g_object_ref_sink(display);
-- 
2.5.0