title: Unity3D Slider onValueChanged sending only 0 (or other defined value)
body: <p>I'm trying to attach an onValueChanged event to my GUI Slider, but for some reason it gives me a mandatory option to put a value in (it's the fourth box in the "On Value Change (Single)" section). Then it only sends the forementioned value, not the actual value of the slider.</p>
  
  <p><a href="https://i.stack.imgur.com/jUSvb.png" rel="noreferrer"><img src="https://i.stack.imgur.com/jUSvb.png" alt="enter image description here"></a></p>
  
  <p>The code for the event is as follows:</p>
  
  <pre><code>public void ChangeWindDirection(float value)
  {
      Debug.Log("New wind direction: " + value);
  }
  </code></pre>
  
  <p>I tried restarting both Unity and Visual Studio 2013 to no avail. Now it even puts the box with a value to every new event I try to create.</p>