automake cleanup: uninitialized version_t

This sometimes gives a completely random uint64_t value, because it is
potentially used uninitialized.

Signed-off-by: Roald J. van Loon <roaldvanloon@gmail.com>
automake cleanup: typo + fixing inttypes.h revamp

Signed-off-by: Roald J. van Loon <roaldvanloon@gmail.com>