Fix special case of LbEnv.csh called from tcsh login or rc

data/LbEnv-flavour.csh

@@ -16,7 +16,11 @@ if ( ! $?LBENV_SOURCED ) then
 
   if ( -e %lbenv_root%/$_host_os/bin/activate.csh ) then
     source %lbenv_root%/$_host_os/bin/activate.csh
-    eval `python -m LbEnv --csh --siteroot %siteroot% !:2* || echo deactivate`
+    if ( `history 1 | wc -l` ) then
+      eval `python -m LbEnv --csh --siteroot %siteroot% !:2* || echo deactivate`
+    else
+      eval `python -m LbEnv --csh --siteroot %siteroot% || echo deactivate`
+    endif
   else
     echo "Platform not supported ($_host_os)"
   endif