Fix: modified :total type to positive integer

The input `:total` value is float, but the output `:current` value is more than `:total` value. The input `:total` is nagative integer or zero, but the output rendering failed.

Closes visionmedia#177, visionmedia#166

lib/node-progress.js

@@ -1,3 +1,4 @@
+
 /*!
  * node-progress
  * Copyright(c) 2011 TJ Holowaychuk <[email protected]>
@@ -52,8 +53,10 @@ function ProgressBar(fmt, options) {
   } else {
     options = options || {};
     if ('string' != typeof fmt) throw new Error('format required');
-    if ('number' != typeof options.total) throw new Error('total required');
-  }
+    if (options.total % 1 !== 0 || options.total <= 0) {
+      throw new Error('format required positive integer');
+    }
+  }s
 
   this.fmt = fmt;
   this.curr = options.curr || 0;
@@ -154,7 +157,7 @@ ProgressBar.prototype.render = function (tokens, force) {
   }
 
   var width = Math.min(this.width, availableSpace);
-
+  width = Math.floor(width);
   /* TODO: the following assumes the user has one ':bar' token */
   completeLength = Math.round(width * ratio);
   complete = Array(Math.max(0, completeLength + 1)).join(this.chars.complete);