fix status line for single unit

check_systemdunit

@@ -153,7 +153,7 @@ if [ $_iActive -eq 0 ]; then
   ph.setStatus critical
 else
   typeset -i _iInstances; _iInstances=$( grep -c "Loaded: " <<< "${_data}" )
-  if [ $_iInstances -gt 0 ]; then
+  if [ $_iInstances -gt 1 ]; then
 
     _status="$_iActive of $_iInstances ${_unit} units are active"
     _out="$_data"