[Bug 19784] cmd doesn't handle ( ) scoping; breaks firefox build

http://bugs.winehq.org/show_bug.cgi?id=19784

--- Comment #1 from Dan Kegel   2009-08-18 21:44:52 ---
Sorry, the first line of the batch file was mistyped, should be

set FOO=bar
if "%FOO%"=="bar" (
  echo "yup"
) else (
  echo "nope"
)