title: Example of using "byte" datatype with protobuf-c
body: <p>I'm trying to use protobuf-c in a c-project to transfer some data.
  The examples for the "string" and the "byte" datatype are missing <a href="https://code.google.com/p/protobuf-c/" rel="nofollow">here</a></p>
  
  <p>Can anyone provide a small example for those? My problem is that I don't know how to allocate memory for a message with these datatypes since their size is not known at compile time.</p>