title: Primefaces Input with BigDecimalConverter ignores empty String
body: <p><strong>Setup:</strong> Primefaces 3.4.2, JSF2</p>
  
  <p>I have a form with 4 input fields that posts data when onblur is triggered.</p>
  
  <p><strong>Description</strong>
  I put values into all of the 4 input fields and that works as it should. Then I start removing the values one by one. For all of the fields that has BigDecimalConverters I can not remove the values, as soon as I leave the field and start removing in the next one the value returns to the field.</p>
  
  <p>I have used the network tab in the developer tools for IE and Chrome and I can see that the posts send the empty value and then it gets a respons saying that there should be a different number in the field.</p>
  
  <p>Does anyone know what can cause this behaviour?</p>