title: Empty body in POST in ASIHTTPRequest
body: <p>Basically, I am sending a POST request with an empty data body:</p>
  
  <pre><code>  ASIHTTPRequest *request [ASIHTTPRequest alloc] init];
    [request setURL:[NSURL URLWithString:escapedUrlString]];
    [request setRequestMethod:@"POST"];
    [request addRequestHeader:@"Content-Type" value:@"application/xml"];
    [request startSynchronous];
  </code></pre>
  
  <p>But i am getting this response each time:</p>
  
  <p>Incorrect NSStringEncoding value 0x0000 detected. Assuming NSStringEncodingASCII. Will stop this compatiblity mapping behavior in the near future.</p>
  
  <p>I am wondering if it's mandatory to set post values.</p>