New build break on AIX

[mcnichol at austin.ibm.com]

Looks like some changes last week to sessreg.c are causing problems
when building the latest monolithic tree.


making all in programs/xdm...
Target "all" is up to date.
        xlc_r -O -D__STR31__ -DNDEBUG      -I../.. -I../../exports/include   -DSYSV -DAIXV3 -DAIXV4 -DAIXV5 -D_ALL_SOURCE  -DFUNCPROTO=15   -DBINDIR=\"/xorg/X1132/bin\" -DXDMDIR=\"/xorg/X1132/lib/X11/xdm\"      -DHASXDMAUTH     -DUSE_PAM -DTCPCONN -DUNIXCONN   -DHAS_STICKY_DIR_BIT -DHAS_FCHOWN -DIPv6  -DGREET_USER_STATIC      -DOSMAJORVERSION=5  -DOSMINORVERSION=3     -DXPM        -c sessreg.c
"sessreg.c", line 123.17: 1506-296 (S) #include file <lastlog.h> not found.
"sessreg.c", line 431.32: 1506-007 (S) "struct lastlog" is undefined.
make: The error code from the last command is 1.



Dan