Log Message:
In include/config.h, uint32 was by default defined as an unsigned long.
However (because of -DTW_TYPE32='int' being added to CFLAGS for an LP64 fix
in revision 1.3 of patches/patch-aa) uint32 is defined as an unsigned int.
This caused two problems:
1) The format string in include/tripwire.h was not updated to match.
2) On NetBSD, off_t is __int64_t.

I am changing the format string in tripwire.h to match uint32.  I also
changed the type of the variable "size" from uint32 to off_t, and changed
its format string to match intmax_t.

This fixes the sparc64 coredump mentioned in PR 19391.