Adjustments and bug fixes after adding prototypes to include files.

Adjustments and bug fixes after adding prototypes to include files.

SCCS-vsn: lib/libc/stdlib/abort.c 5.11
SCCS-vsn: lib/libc/stdlib/atoi.c 5.7
SCCS-vsn: lib/libc/stdlib/atol.c 5.7
SCCS-vsn: lib/libc/stdlib/bsearch.c 5.4
SCCS-vsn: lib/libc/stdlib/calloc.c 5.6
SCCS-vsn: lib/libc/stdlib/exit.c 5.4
SCCS-vsn: lib/libc/stdlib/getenv.c 5.8
SCCS-vsn: lib/libc/stdlib/malloc.c 5.11
SCCS-vsn: lib/libc/stdlib/putenv.c 5.4
SCCS-vsn: lib/libc/stdlib/qsort.c 5.9
SCCS-vsn: lib/libc/stdlib/radixsort.c 5.7
SCCS-vsn: lib/libc/stdlib/rand.c 5.5
SCCS-vsn: lib/libc/stdlib/setenv.c 5.5
SCCS-vsn: lib/libc/stdlib/strtol.c 5.4
SCCS-vsn: lib/libc/stdlib/strtoul.c 5.3
SCCS-vsn: lib/libc/stdlib/system.c 5.10