bin/har in har-0.0.4 vs bin/har in har-0.0.5

@@ -1,9 +1,10 @@
 #!/usr/bin/env ruby
 
 require "har"
 
 begin
+  ARGV << "-" if ARGV.empty?
   HAR::Viewer.new(ARGV).show
 rescue HAR::Error => ex
   abort "\n\n#{ex.message}"
 end
\ No newline at end of file