robustify sexpr parser for NICs

ChangeLog

+Thu Feb  5 16:53:37 GMT 2009 John Levon <john.levon@sun.com>
+
+	* src/xend_internal.c: robustify sexpr parser for NICs
+
 Thu Feb 5 17:03:35 +0100 2009 Jim Meyering <meyering@redhat.com>
 
 	syntax-check: enable prohibit_nonreentrant

src/xend_internal.c

@@ -1759,7 +1759,8 @@ xenDaemonParseSxprNets(virConnectPtr conn,
             if (VIR_ALLOC(net) < 0)
                 goto no_memory;
 
-            if (tmp != NULL || (STREQ(tmp2, DEFAULT_VIF_SCRIPT))) {
+            if (tmp != NULL ||
+                (tmp2 != NULL && STREQ(tmp2, DEFAULT_VIF_SCRIPT))) {
                 net->type = VIR_DOMAIN_NET_TYPE_BRIDGE;
                 /* XXX virtual network reverse resolve */