Update to keep the pool from repeatedly hammering the BT check.

lib/local_comms.js

@@ -536,8 +536,11 @@ function Database(){
         // Hopping into async, we need the current block height to know where to start our indexing...
         async.waterfall([
             function(callback){
-                global.coinFuncs.getLastBlockHeader(function(body){
-                    callback(null, body.height, Math.floor(body.difficulty * 1.5 * global.config.pplns.shareMultiLog));
+                global.coinFuncs.getLastBlockHeader(function(err, body){
+                    if (err) {
+                        return callback(true, body);
+                    }
+                    return callback(null, body.height, Math.floor(body.difficulty * 1.5 * global.config.pplns.shareMultiLog));
                 });
             },
             function (lastBlock, difficulty, callback) {
@@ -586,7 +589,7 @@ function Database(){
                 callback(null, blockList);
             }
         ], function(err, data){
-            if (global.config.general.blockCleaner === true){
+            if (err === null && global.config.general.blockCleaner === true){
                 if(data.length > 0){
                     global.database.refreshEnv();
                     let blockList = global.database.getBlockList();