Make compilable.  if_fddisubr.c depended on sys/malloc.h by my previous commit.
Make compilable.  if_fddisubr.c depended on sys/malloc.h by my
previous commit.

Reported by:	Jim Bryant <jbryant@A010-0935.KSCY.splitrock.net>

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase