[virt-tools-list] [virt-viewer][PATCH 1/4 v2] Make sure conn exists before use it

[Fabiano Fidêncio]

Although all the used functions have a explicit check for a valid
virConnPtr, let's be safe and only use priv->conn when its value is
non-NULL.
---
Changes since v1:
- Set priv->conn to NULL
---
 src/virt-viewer.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/src/virt-viewer.c b/src/virt-viewer.c
index dc16b3f..02385db 100644
--- a/src/virt-viewer.c
+++ b/src/virt-viewer.c
@@ -529,15 +529,17 @@ virt_viewer_dispose (GObject *object)
     VirtViewer *self = VIRT_VIEWER(object);
     VirtViewerPrivate *priv = self->priv;
 
-    if (priv->withEvents)
-        virConnectDomainEventDeregister(priv->conn,
-                                        virt_viewer_domain_event);
-    virConnectUnregisterCloseCallback(priv->conn,
-                                      virt_viewer_conn_event);
+    if (priv->conn) {
+        if (priv->withEvents)
+            virConnectDomainEventDeregister(priv->conn,
+                                            virt_viewer_domain_event);
+        virConnectUnregisterCloseCallback(priv->conn,
+                                          virt_viewer_conn_event);
+        virConnectClose(priv->conn);
+        priv->conn = NULL;
+    }
     if (priv->dom)
         virDomainFree(priv->dom);
-    if (priv->conn)
-        virConnectClose(priv->conn);
     g_free(priv->uri);
     priv->uri = NULL;
     g_free(priv->domkey);
-- 
2.1.0