Mini-patch for cccp.c

[Jeffrey A Law]

  In message < 199709301300.OAA01773@mvmap66.ciw.uni-karlsruhe.de >you write:
  > - system_header_p as char saves no space, since the struct gets padded
  >   anyway
But if we want to add more fields later it may save space.

  > - It may slow down processing infinitesimally (converting to/from int)
Or it may speed it up.  It's target dependent.

  > - using chars as Booleans are a bad idea, anyway
Why?

  > - This patch shuts up a spurious warning by checkergcc (which is why I
  >   did it in the first place)
What is the warning?

jeff