Revert.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@10793 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

eval.c

@@ -2877,10 +2877,9 @@ rb_eval(VALUE self, NODE *n)
 
       case NODE_CASE:
 	{
-	    VALUE val = Qundef;
+	    VALUE val;
 
-	    if (node->nd_head)
-		val = rb_eval(self, node->nd_head);
+	    val = rb_eval(self, node->nd_head);
 	    node = node->nd_body;
 	    while (node) {
 		if (nd_type(node) != NODE_WHEN) {

parse.y

@@ -2605,7 +2605,7 @@ primary		: literal
 		| keyword_case opt_terms case_body keyword_end
 		    {
 		    /*%%%*/
-			$$ = NEW_CASE(NULL, $3);
+			$$ = $3;
 		    /*%
 			$$ = dispatch2(case, Qnil, $3);
 		    %*/