try to fix core. log redirects.

Spider.cpp

@@ -2200,6 +2200,10 @@ long SpiderColl::getNextIpFromWaitingTree ( ) {
 	// current time on host #0
 	uint64_t nowMS = gettimeofdayInMillisecondsGlobal();
  top:
+
+	// we might have deleted the only node below...
+	if ( m_waitingTree.isEmpty() ) return 0;
+
 	// advance to next
 	//m_waitingTreeKey += 1LL;
 	// assume none

XmlDoc.cpp

@@ -8949,9 +8949,9 @@ Url **XmlDoc::getRedirUrl() {
 	//	return &m_redirUrlPtr;
 	//}
 	// log a msg
-	//if ( g_conf.m_logSpideredUrls )
-	//	logf(LOG_INFO,"build: %s redirected to %s",
-	//	     cu->getUrl(),loc->getUrl());
+	if ( g_conf.m_logSpideredUrls )
+		logf(LOG_INFO,"build: %s redirected to %s",
+		     cu->getUrl(),loc->getUrl());
 
 	// if not same Domain, it is not a simplified redirect
 	bool sameDom = true;