Mini-patch for cccp.c

[meissner@cygnus.com]

| 
| On 7 Oct 1997, Andreas Schwab wrote:
| 
| > |> 	Having to remember to init structure members when new ones are
| > |> added is prone to error.  Isn't it better to do bzero(&foo, sizeof(foo))
| > |> and then set any non zero members?
| > Pedantically this won't work for pointers in the structure, ie. they still
| > have to be initialized explicitly.
| 
| Do you mean machines where the machine representation of NULL-addresses
| has some bits set? I wonder if GCC supports such machines at all?

Yes there have been machines out there that at least comptemplated making NULL
have non-zero bits (I know I at least flirted with it on the Data General
MV/Eclipse computers but never did, the PR1ME, Livermore S1, and Symbolics
computers come to mind as machines that had a non-zero NULL pointer).  No, GCC
would never run on those machines.

GCC makes a number of simplifying assumptions about the machines it generates
code for, such as all pointers are the same size and format (though I recently
did a port for a machine that had two different formats, and I had to not
implement certain things like trampolines and labels as values because of it --
it wasn't pretty).