title: Redis ReplyError(string) when passing floating point number
body: <p>When I am passing a floating point number <code>-3.074</code> to <code>hincrby</code> I am getting this error.</p>
  <blockquote>
  <p>ReplyError: ERR value is not an integer or out of range</p>
  </blockquote>
  <p>Code</p>
  <pre class="lang-js prettyprint-override"><code>console.log(typeof sizeInMB, sizeInMB) // number -3.074
  redis.hincrby('MYHASH', 'storage', sizeInMB) // throws above error 
  </code></pre>
  <p>I am very new to redis, forgive me if I missed something obvious.</p>