Couple of tiny tweaks

- I remember reading in recent history that the explicit void is "proper
  C technique" whereas the empty argument list is better for C++.  I
  think.
  Here it is:  http://stackoverflow.com/a/416354/18347
  - Apparently void wasn't available for most compilers prior to C90?
- I suspect that explicitly returning a value is considered better form
  by some.  (I don't have a source for this, after Googling my way into
  some flame wars & running away...)