tipc: Invoke ls with "command"

Author: scop

completions/tipc

@@ -44,7 +44,7 @@ _tipc_bearer() {
             COMPREPLY=( $( compgen -W '$names' -- $cur) )
             ;;
         "eth")
-            local interfaces=$(ls /sys/class/net/)
+            local interfaces=$(command ls /sys/class/net/)
             COMPREPLY=( $( compgen -W '$interfaces' -- $cur ) )
             ;;
         esac