Use C99.
Use C99.

We were already depending on some C99 features.  Let's just make it
official so we can start mixing code and variable declarations (along
with some other nice things).

Signed-off-by: Evan Nemerson <178b62e73cc3fab9e30bf27b2372c9ff92401915@coeus-group.com>

jibsen/squash,Cloudef/squash,wolut/squash,jibsen/squash,quixdb/squash,jibsen/squash,wolut/squash,Cloudef/squash,quixdb/squash,wolut/squash,quixdb/squash,Cloudef/squash