MFC rev 1.20: Fix FD_ISSET() on LP64 platforms.
MFC rev 1.20: Fix FD_ISSET() on LP64 platforms.

PR: ia64/91421
Submitted by: Tanaka Akira (akr at m17n dot org)

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