Log Message:
-----------
Make sure list of tests is cleared out before getting the new list
of tests. Per Andrew Dunstan.
Modified Files:
--------------
pgsql/src/tools/msvc:
vcregress.bat (r1.7 -> r1.8)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/tools/msvc/vcregress.bat.diff?r1=1.7&r2=1.8)