_margins.scss in susy-2.0.0.beta.1

- old
+ new

@@ -7,10 +7,10 @@
 // - $after   : <length>
 // - [$flow]  : ltr | rtl
 @mixin margin-output(
   $before,
   $after,
-  $flow: susy-get(flow)
+  $flow: map-get($susy-defaults, flow)
 ) {
   $to: to($flow);
   $from: from($flow);
 
   margin-#{$from}: $before;