tests: cleaned up asprintf.c.
tests: cleaned up asprintf.c.

Snaipe/Criterion,Snaipe/Criterion,offa/Criterion,offa/Criterion,offa/Criterion,offa/Criterion,Snaipe/Criterion,Snaipe/Criterion,am11/Criterion,a1lu/Criterion,am11/Criterion,a1lu/Criterion,am11/Criterion,a1lu/Criterion,a1lu/Criterion,Snaipe/Criterion,offa/Criterion,a1lu/Criterion,am11/Criterion,am11/Criterion