AbstractIDPValve throws NPE when using metadata and AuthnRequestsSigned is null.

2013-10-17 11:08:24,179 TRACE [org.picketlink.identity.federation] (http-/10.27.103.37:8080-1) Issuer: http://samlsp.bluejeans.com, isRequestSigned: null
2013-10-17 11:08:24,179 ERROR [org.picketlink.identity.federation] (http-/10.27.103.37:8080-1) PLFED000253: Exception in processing request: java.lang.NullPointerException
at org.picketlink.identity.federation.bindings.tomcat.idp.AbstractIDPValve.willIgnoreSignatureOfCurrentRequest(AbstractIDPValve.java:1254) [picketlink-jbas7.jar:2.1.3.1-redhat-1]
at org.picketlink.identity.federation.bindings.tomcat.idp.AbstractIDPValve.processSAMLRequestMessage(AbstractIDPValve.java:534) [picketlink-jbas7.jar:2.1.3.1-redhat-1]
at org.picketlink.identity.federation.bindings.tomcat.idp.AbstractIDPValve.invoke(AbstractIDPValve.java:384) [picketlink-jbas7.jar:2.1.3.1-redhat-1]
at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) [jboss-as-web.jar:7.1.2.Final-redhat-1]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb.jar:]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb.jar:]
at org.jboss.as.web.sso.ClusteredSingleSignOn.invoke(ClusteredSingleSignOn.java:367) [jboss-as-web.jar:7.1.2.Final-redhat-1]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb.jar:]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) [jbossweb.jar:]
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb.jar:]
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:679) [jbossweb.jar:]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:931) [jbossweb.jar:]
at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_09-icedtea]