Log Message:
-----------
Make build.bat return a proper errorcode if the build fails.
Modified Files:
--------------
pgsql/src/tools/msvc:
build.bat (r1.5 -> r1.6)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/tools/msvc/build.bat.diff?r1=1.5&r2=1.6)