message: Use all of the available space in the buffer returned by ByteBufferFactory to allow the factory to keep a pool of larger than initialsize sized buffers.
diff: @@ -72,7 +72,6 @@ public class FlatBufferBuilder {
  if (initial_size <= 0) {
  initial_size = 1;
  }
  - space = initial_size;
  this.bb_factory = bb_factory;
  if (existing_bb != null) {
  bb = existing_bb;
  @@ -82,6 +81,7 @@ public class FlatBufferBuilder {
  bb = bb_factory.newByteBuffer(initial_size);
  }
  this.utf8 = utf8;
  + space = bb.capacity();
  }
  /**
  