Use -print-last-dir option for lfcd.cmd (#1444)

* exit lf not the cmd

* exit successfully

* use -print-last-dir

etc/lfcd.cmd

@@ -3,13 +3,4 @@ rem Change working dir in cmd.exe to last dir in lf on exit.
 rem
 rem You need to put this file to a folder in %PATH% variable.
 
-:tmploop
-set tmpfile="%tmp%\lf.%random%.tmp"
-if exist %tmpfile% goto:tmploop
-lf -last-dir-path=%tmpfile% %*
-if not exist %tmpfile% exit
-set /p dir=<%tmpfile%
-del /f %tmpfile%
-if not exist "%dir%" exit
-if "%dir%" == "%cd%" exit
-cd /d "%dir%"
+for /f "usebackq tokens=*" %%d in (`lf -print-last-dir %*`) do cd %%d