Thread: pgsql: Change the float4-returning functions in contrib/seg to fmgr v1

Log Message:
-----------
Change the float4-returning functions in contrib/seg to fmgr v1 calling
conventions.

I also changed seg_in and seg_out, which was probably unnecessary, but
it can't harm.

Modified Files:
--------------
    pgsql/contrib/seg:
        seg.c (r1.21 -> r1.22)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/seg/seg.c?r1=1.21&r2=1.22)