Fix to HasVirtualNodes(); must join with the reserved table.

db/Node.pm.in

@@ -1267,8 +1267,11 @@ sub HasVirtualNodes($)
     my $node_id = $self->node_id();
 
     my $query_result = 
-	DBQueryWarn("select node_id from nodes ".
-		    "where phys_nodeid='$node_id' and node_id!=phys_nodeid");
+	DBQueryWarn("select nodes.node_id from nodes ".
+		    "left join reserved on reserved.node_id=nodes.node_id ".
+		    "where nodes.phys_nodeid='$node_id' and ".
+		    "      nodes.node_id!=nodes.phys_nodeid and ".
+		    "      reserved.node_id is not null");
     return -1
 	if (!$query_result);