Make sure we do not pass spurious arguments to LbEnv

data/etc/cern_profile.sh

@@ -40,6 +40,8 @@ if [ -e "${_home_dir}" -a ! \( -e "${_home_dir}/.nogrouplogin" \) ] ; then
 
   if [ ! -e "${_home_dir}/.nolbenv" ] ; then
     # LbEnv enabled
+    # - make sure we do not get spurious "source" command line arguments to the scripts
+    shift $#
     # - check the requested flavour
     if [ -e "${_home_dir}/.devLHCBLoginscript" ] ; then
       # this is legacy for...