message: win32: update setupvars.cmd
  drop EnableDelayedExpansion
  pause on failed commands (non-interactive mode)
diff: @ECHO OFF
  -SETLOCAL EnableDelayedExpansion
  SET "SCRIPT_DIR=%~dp0"
  IF NOT DEFINED OPENCV_QUIET ( ECHO Setting vars for OpenCV @OPENCV_VERSION@ )
  -SET "PATH=!SCRIPT_DIR!\@OPENCV_LIB_RUNTIME_DIR_RELATIVE_CMAKECONFIG@;%PATH%"
  +SET "PATH=%SCRIPT_DIR%\@OPENCV_LIB_RUNTIME_DIR_RELATIVE_CMAKECONFIG@;%PATH%"
  -IF NOT DEFINED OPENCV_SKIP_PYTHON (
  - SET "PYTHONPATH_OPENCV=!SCRIPT_DIR!\@OPENCV_PYTHON_DIR_RELATIVE_CMAKECONFIG@"
  - IF NOT DEFINED OPENCV_QUIET ( ECHO Append PYTHONPATH: !PYTHONPATH_OPENCV! )
  - SET "PYTHONPATH=!PYTHONPATH_OPENCV!;%PYTHONPATH%"
  -)
  +IF NOT DEFINED OPENCV_SKIP_PYTHON CALL :SET_PYTHON
  +
  +SET SCRIPT_DIR=
  +
  +IF NOT [%1] == [] GOTO :RUN_COMMAND
  +
  +GOTO :EOF
  +
  +:RUN_COMMAND
  +SET RUN_INTERACTIVE=1
  +echo %CMDCMDLINE% | find /i "%~0" >nul
  +IF NOT errorlevel 1 set RUN_INTERACTIVE=0
  -IF NOT [%1] == [] (
  %*
  - EXIT /B !errorlevel!
  +SET RESULT=%ERRORLEVEL%
  +IF %RESULT% NEQ 0 (
  + IF _%RUN_INTERACTIVE%_==_0_ ( IF NOT DEFINED OPENCV_BATCH_MODE ( pause ) )
  )
  +EXIT /B %RESULT%
  +
  +:SET_PYTHON
  +SET "PYTHONPATH_OPENCV=%SCRIPT_DIR%\@OPENCV_PYTHON_DIR_RELATIVE_CMAKECONFIG@"
  +IF NOT DEFINED OPENCV_QUIET ( ECHO Append PYTHONPATH: %PYTHONPATH_OPENCV% )
  +SET "PYTHONPATH=%PYTHONPATH_OPENCV%;%PYTHONPATH%"
  +SET PYTHONPATH_OPENCV=
  +EXIT /B
  +
  +
  +:EOF
  