Windows doesn't have M_PI; define it ourselves when needed.
This should fix the Windows build, broken by commit ed802e7d.
Branch
------
master
Details
-------
http://git.postgresql.org/pg/commitdiff/cd74a151b5a2498f0909074ebc9e8d8fbe6915b1
Modified Files
--------------
contrib/pgbench/pgbench.c | 4 ++++
1 file changed, 4 insertions(+)