Silence some unused variable warnings.
Fix inline-related macro issues.

Add JEMALLOC_INLINE_C and use it instead of JEMALLOC_INLINE in .c files,
so that the annotated functions are always static.

Remove SFMT's inline-related macros and use jemalloc's instead, so that
there's no danger of interactions with jemalloc's definitions that
disable inlining for debug builds.
Clean up SFMT test.

Refactor array declarations to remove some dubious casts.

Reduce array size to what is actually used.

Extract magic numbers into cpp macro definitions.