Superficial cleanup of the code. Mostly taking lines such as:

Superficial cleanup of the code.  Mostly taking lines such as:

  ...

  /*
   * <Enslish recapituation of the single following C statement>
   */
  <single C statement>

...and rewrote as:

  ...
  <single C statement>

freeglut_main.c still has a lot of that in it, but it looks a bit
better, now.

git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@241 7f0cb862-5218-0410-a997-914c9d46530a