win32: add cast to avoid warning about LONGLONG to size_t

Release 0.9.15

new date

Bump to 0.9.13

Remove bogus file

added by mistake in 17c09fa

Bump version to 0.9.11

Doc tweak

Measured perf cost of meminit was 7% worst case on an Intel Core2
system. YMMV.

Bump to 0.9.9

Release 0.9.8

Silence warnings