reinstating makeReturn for statement literals.

lib/nodes.js

@@ -320,7 +320,11 @@
       this.value = value;
     }
     Literal.prototype.makeReturn = function() {
-      return new Return(this);
+      if (this.isStatement()) {
+        return this;
+      } else {
+        return new Return(this);
+      }
     };
     Literal.prototype.isAssignable = function() {
       return IDENTIFIER.test(this.value);

src/nodes.coffee

@@ -271,7 +271,7 @@ exports.Literal = class Literal extends Base
   constructor: (@value) ->
 
   makeReturn: ->
-    new Return this
+    if @isStatement() then this else new Return this
 
   isAssignable: ->
     IDENTIFIER.test @value

test/test_switch.coffee

@@ -90,3 +90,14 @@ obj = {
 }
 
 ok obj.func(yes) is 101
+
+
+# Switch with break as the return value of a loop.
+i = 10
+results = while i > 0
+  i--
+  switch i % 2
+    when 1 then i
+    when 0 then break
+
+eq results.join(', '), '9, , 7, , 5, , 3, , 1, '