fix a mistake in the ShellCommand merging previous commit

git-svn-id: http://gar.svn.sourceforge.net/svnroot/gar/csw/mgar/gar/v2@20983 d3b55034-1cff-0310-a425-aefe953e1e90
really fix the mistake and stop drinking too much

git-svn-id: http://gar.svn.sourceforge.net/svnroot/gar/csw/mgar/gar/v2@20984 d3b55034-1cff-0310-a425-aefe953e1e90