[Bug 19071] New: Reg.exe doesn't error out on invalid input

http://bugs.winehq.org/show_bug.cgi?id=19071

Summary: Reg.exe doesn't error out on invalid input
           Product: Wine
           Version: 1.1.24
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: download, source
          Severity: minor
          Priority: P2
         Component: programs
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Using 'reg del /?'
On windows:
Error:  Bad operation.  User /? for help

On wine:
austin@midna:~/wine-git/programs$ wine reg del /? ; echo $?
0