Clear some random compile warnings.

I saw a bunch fly by. Here are a few fixes.

ssize_t is %zd. Types from stdint.h use PRI* macros from inttypes.h.
Finally, use C99 initializers rather than the old GNU extension.

Test: make checkbuild
Change-Id: I343dfb99984ab826c7641e311e041e859eb61d93
4 files changed