Three more patches in this series:
1) Fix a small mistake that caused gcc warnings.
2) I measured the amount of RAM that the tests need:
$ /usr/bin/time -f "Max RSS: %M KiB" ./test-...printf-big
This is consistent with what I see by watching the process through "top".
3) vasnwprintf tests:
* tests/test-vasnprintf-big.c: New file.
* modules/vasnprintf-extra-tests: New file.
* modules/vasnprintf-tests (Depends-on): Depend on it.
vasnprintf, u*-vasnprintf: Support string arguments longer than 2 GiB.
* lib/vasnprintf.c: Include .
(VASNPRINTF): In 64-bit
