[libgovirt] Fix potential segfault on malformed XML

[Christophe Fergeau <teuf src gnome org>]

commit 5e0f8ccb3733a89c1aba4eaaac3c743dc46716f2
Author: Christophe Fergeau <cfergeau redhat com>
Date:   Thu Oct 9 15:29:01 2014 +0200

    Fix potential segfault on malformed XML
    
    ovirt_resource_set_{actions,sub_collections}_from_xml warn if
    link_node->name is NULL, but then call strcmp() on it anyway, which
    would cause a crash. Use g_strcpm0() instead to avoid the crash.
    The rest of the code will safely handle a NULL link_node->name.
    
    This issue was reported by Coverity.

 govirt/ovirt-resource.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/govirt/ovirt-resource.c b/govirt/ovirt-resource.c
index a6eb026..cfecc96 100644
--- a/govirt/ovirt-resource.c
+++ b/govirt/ovirt-resource.c
@@ -330,7 +330,7 @@ ovirt_resource_set_actions_from_xml(OvirtResource *resource, RestXmlNode *node)
 
         g_warn_if_fail(link_node != NULL);
         g_warn_if_fail(link_node->name != NULL);
-        g_warn_if_fail(strcmp(link_node->name, "link") == 0);
+        g_warn_if_fail(g_strcmp0(link_node->name, "link") == 0);
 
         link_name = rest_xml_node_get_attr(link_node, "rel");
         href = rest_xml_node_get_attr(link_node, "href");
@@ -360,7 +360,7 @@ ovirt_resource_set_sub_collections_from_xml(OvirtResource *resource,
 
         g_warn_if_fail(link_node != NULL);
         g_warn_if_fail(link_node->name != NULL);
-        g_warn_if_fail(strcmp(link_node->name, "link") == 0);
+        g_warn_if_fail(g_strcmp0(link_node->name, "link") == 0);
 
         link_name = rest_xml_node_get_attr(link_node, "rel");
         href = rest_xml_node_get_attr(link_node, "href");