Merge pull request #63 from cubedro/develop

Removed negative blocktimes

lib/node.js

@@ -265,6 +265,8 @@ Node.prototype.calculateBlockTimes = function()
 	{
 		var diff = (key > 0 ? list[key - 1].timestamp : Math.floor(Date.now()/1000)) - block.timestamp;
 
+		diff = Math.max(diff, 0);
+
 		return diff;
 	});