"introduce no new bootstrap warning" criteria. was: Loop iv debugging, patch

[dewar@gnat.com]

<<* On systems where %p isn't supported, the backup method for printing
pointers using appropriate sized integer specifiers always causes
-Wformat warnings.  I don't think this one has a solution.
>>

Yes, it does, you can always get the effect of a warning free cast by
casting pointers to two objects. So you can cast a pointer to the
pointer to a pointer to int, and then print the contents of this pointer
in the proper format.