Check mode no longer updates the last block height

-Also add output displaying which block is currently being checked as before it was almost impossible to determine what, if anything was happening in check mode

lib/database.js

@@ -955,7 +955,7 @@ module.exports = {
   },
 
   // updates tx, address & richlist db's; called by sync.js
-  update_tx_db: function(coin, start, end, txes, timeout, cb) {
+  update_tx_db: function(coin, start, end, txes, timeout, check_only, cb) {
     var complete = false;
     var blocks_to_scan = [];
     var task_limit_blocks = settings.sync.block_parallel_tasks;
@@ -972,11 +972,13 @@ module.exports = {
       blocks_to_scan.push(i);
 
     async.eachLimit(blocks_to_scan, task_limit_blocks, function(block_height, next_block) {
-      if (block_height % settings.sync.save_stats_after_sync_blocks === 0) {
+      if (!check_only && block_height % settings.sync.save_stats_after_sync_blocks === 0) {
         Stats.updateOne({coin: coin}, {
           last: block_height - 1,
           txes: txes
         }, function() {});
+      } else if (check_only) {
+        console.log('checking block ' + block_height + '...');
       }
 
       lib.get_blockhash(block_height, function(blockhash) {