Log Message:
-----------
Adjust MSVC build script too, now that the walreceiver dynamic module
has been renamed.
Modified Files:
--------------
pgsql/src/tools/msvc:
Mkvcbuild.pm (r1.50 -> r1.51)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/tools/msvc/Mkvcbuild.pm?r1=1.50&r2=1.51)