don't use node_state from not existing node ids

fixes also:
java.lang.NullPointerException
null
lcmc.data.CRMXML.parseCibQuery(CRMXML.java:3440)
lcmc.data.ClusterStatus.parseCibQuery(ClusterStatus.java:682)
lcmc.data.ClusterStatus.parseCommand(ClusterStatus.java:614)
lcmc.data.ClusterStatus.parseStatus(ClusterStatus.java:650)
lcmc.gui.ClusterBrowser.processClusterOutput(ClusterBrowser.java:1254)
lcmc.gui.ClusterBrowser$15.output(ClusterBrowser.java:1371)